{"id":3946,"date":"2023-10-06T08:18:05","date_gmt":"2023-10-06T08:18:05","guid":{"rendered":"http:\/\/localhost\/ecole9ja\/?p=3946"},"modified":"2023-10-06T08:19:51","modified_gmt":"2023-10-06T08:19:51","slug":"week-7-ss3-second-term-chemistry-notes","status":"publish","type":"post","link":"https:\/\/ecolebooks.com\/nigeria\/posts\/week-7-ss3-second-term-chemistry-notes\/","title":{"rendered":"Week 7 &#8211; SS3 Second Term Chemistry Notes"},"content":{"rendered":"<p>\u00a0<strong>WEEK SEVEN<br \/>\n<\/strong><strong>TOPIC: INTRODUCTION TO QUALITATIVE ANALYSIS<br \/>\n<\/strong><\/p>\n<ul>\n<li>Introduction to Qualitative Analysis\n<\/li>\n<\/ul>\n<p>Test for carbons using H2S, NaOH and NH4OH, Confirmatory Test for the cat ions.<\/p>\n<p>\u00a0<strong>Introduction to Qualitative Analysis<br \/>\n<\/strong>Qualitative analysis involves examination of colour, flame test, effect of heat and confirmatory test for cat ion and anions.<br \/>\nCations are metallic ions e,g Ca<sup>2+<\/sup>, Pb<sup>2+<\/sup>, Al<sup>3+<\/sup>, Cu<sup>2+<\/sup>, Fe<sup>2+<\/sup> , Fe<sup>3+<\/sup>, etc<\/p>\n<p>\u00a0<strong>Rules in Qualitative Analysis<br \/>\n<\/strong><\/p>\n<ol>\n<li>Your test solution should not be diluted too much\n<\/li>\n<li>Use only small quantity of reagents\n<\/li>\n<\/ol>\n<p>Examination of colour and physical state of specimen <\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0<strong>Substance<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0      <strong>colour<\/strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<strong>physical state<\/strong><br \/>\n\t\t1.\u00a0\u00a0\u00a0\u00a0Sulphur\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0      yellow\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0solid<br \/>\n2.\u00a0\u00a0\u00a0\u00a0Copper(ii)oxide\u00a0\u00a0\u00a0\u00a0      black\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0solid<br \/>\n3.\u00a0\u00a0\u00a0\u00a0Iodine\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0     dark brown\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0solid<br \/>\n4.\u00a0\u00a0\u00a0\u00a0Nitrogen iv oxide\u00a0\u00a0\u00a0\u00a0     reddish brown\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0gas<br \/>\n5. \u00a0\u00a0\u00a0\u00a0Mercury\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0     white\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0liquid<\/p>\n<p>\u00a0<strong>Flame test<br \/>\n<\/strong><\/p>\n<ol>\n<li>Deep green colour of flame indicate the presence of copper\n<\/li>\n<li>Deep yellow colour indicate the presence of sodium\n<\/li>\n<li>Brick red indicate calcium.\n<\/li>\n<\/ol>\n<p>\u00a0<strong>EVALUATION<br \/>\n<\/strong><\/p>\n<ol>\n<li>State ten (10) examples of cations\n<\/li>\n<li>\n<div>Give the colour of the following substance.\n<\/div>\n<ol>\n<li>Distilled water\n<\/li>\n<li>Iron filling\n<\/li>\n<li>Manganese(iv) oxide\n<\/li>\n<li>Benzoic acid.\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n<p>\u00a0<strong>Test for Cations<br \/>\n<\/strong>The Cations are Ca<sup>2+<\/sup>, Zn<sup>2+<\/sup>, Al<sup>3+<\/sup>, Pb<sup>2+<\/sup>, Fe<sup>2+<\/sup>. Fe<sup>3+<\/sup>, Cu<sup>2+<\/sup>, NH4 <sup>+<\/sup><\/p>\n<p>\u00a0<strong>Test for Ca<sup>2+<br \/>\n\t\t\t\t\t<\/sup><\/strong><strong>\u00a0\u00a0\u00a0\u00a0Test\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Observation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Inferences<br \/>\n<\/strong>Sample + H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve to give a \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Colourless solution<br \/>\n+ NaOH in drop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white powdery precipitate\u00a0\u00a0\u00a0\u00a0<br \/>\nin excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Ca<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se1.png\" alt=\"\"\/>soln + NH<sub>3<\/sub> soln\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0No noticeable reaction\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Ca<sup>2+<\/sup> present<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<br \/>\n<strong>Test for Zn<sup>2+<\/sup><br \/>\n\t\t\t<\/strong>Sample +\u00a0H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water to\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Give a colourless solution<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se2.png\" alt=\"\"\/>Soln  +\u00a0NaOH in \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white gelatinous precipitate\u00a0\u00a0\u00a0\u00a0Zn<sup>2+<\/sup>, pb<sup>2+<\/sup>,<br \/>\nDrop in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Al<sup>3+<\/sup> may be present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se3.png\" alt=\"\"\/>Soln  +\u00a0\u00a0NH<sub>3<\/sub> soln\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white gelatinous precipitate\u00a0\u00a0\u00a0\u00a0<br \/>\nIn drop<br \/>\nIn excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ppt soluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Zn<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se4.png\" alt=\"\"\/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Test for Al<sup>3+<\/sup><br \/>\n\t\tSample +H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water to give\u00a0\u00a0\u00a0\u00a0soluble<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0a colourless solution<br \/>\nsoln + NaOH<br \/>\nin drop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white gelatinous precipitate   \u00a0\u00a0Zn<sup>2+<\/sup>,pb<sup>2+<\/sup> Al<sup>3+<\/sup> may be<br \/>\nin excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0present<\/p>\n<p>\u00a0Soln + NH<sub>3<\/sub>OH\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white gelatinous ppt<br \/>\nIn drops<br \/>\nIn excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Al<sup>3+<\/sup> or pb<sup>2+<\/sup><\/p>\n<p>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Test for Pb<sup>2+<\/sup><br \/>\n\t\tSample + H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water to give \u00a0\u00a0\u00a0\u00a0\u00a0soluble<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se5.png\" alt=\"\"\/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Colourless solution<br \/>\nSoln + NaOH<br \/>\nIn drop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0   \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0White gelatinous ppt\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Zn<sup>2+<\/sup>,Pb<sup>2+<\/sup>, Al<sup>3+<\/sup><br \/>\n\t\tIn excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0may be present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se6.png\" alt=\"\"\/>Soln+ NH<sub>3<\/sub> soln<br \/>\nIn drop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white gelatinous ppt\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Al<sup>3+<\/sup> or Pb<sup>2+<\/sup><br \/>\n\t\t<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se7.png\" alt=\"\"\/>In excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 may be present<br \/>\nSoln + dil HCl\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0white ppt\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0   \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Pb<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se8.png\" alt=\"\"\/>Ppt + heat\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ppt dissolve when hot and<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Reappear when cool\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  Pb<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se9.png\" alt=\"\"\/>Soln + K<sub>2<\/sub>CrO<sub>4<\/sub>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0yellow precipitate\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  Pb<sup>2+<\/sup> present<\/p>\n<p>\u00a0<strong>Test for Fe<sup>2+<\/sup><br \/>\n\t\t\t<\/strong><img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se10.png\" alt=\"\"\/><img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se11.png\" alt=\"\"\/><strong>Test<\/strong>\u00a0\u00a0\u00a0\u00a0<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Observation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Inferences<\/strong><br \/>\n\t\tSample + H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0    soluble<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se12.png\" alt=\"\"\/>Soln +NaOH soln<br \/>\nIn drops\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dirty green gelatinous ppt\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0    Fe<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se13.png\" alt=\"\"\/>In excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<br \/>\nSoln +NH<sub>3 <\/sub>in \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Dirty green  gelatinous<br \/>\nDrop\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0precipitate\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0     Fe<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se14.png\" alt=\"\"\/>In excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess<\/p>\n<p>\u00a0<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se15.png\" alt=\"\"\/><strong>Test for CU<sup>2+<\/sup><br \/>\n\t\t\t<\/strong><img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se16.png\" alt=\"\"\/><strong>Test\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Observation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Inference<br \/>\n<\/strong>Sample +H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se17.png\" alt=\"\"\/>Soln +NaOH in<br \/>\nDrops\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Blue gelatinous ppt\u00a0\u00a0\u00a0\u00a0<br \/>\nIn excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0insoluble in excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Cu<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se18.png\" alt=\"\"\/>Soln+NH<sub>3<\/sub> in drop\u00a0\u00a0\u00a0\u00a0pale blue gelatinous ppt<br \/>\nIn excess\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble in excess to give a<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Deep blue solution\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Cu<sup>2+<\/sup> present<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se19.png\" alt=\"\"\/>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<br \/>\n<strong>Test for NH<sub>4<\/sub><sup>+<br \/>\n<\/sup><\/strong><img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se20.png\" alt=\"\"\/><strong>Test\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Observation\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Inferences<br \/>\n<\/strong>Sample + H<sub>2<\/sub>O\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0dissolve in water to give a<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0Colourless solution\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0soluble<br \/>\nSoln +NaOH\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0No ppt, but effervescence occur<br \/>\nIn drop + warm         \u00a0\u00a0\u00a0\u00a0with libration of colourless gas<br \/>\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0with choking smell<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se21.png\" alt=\"\"\/>Gas + moist\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0It turns moist red litmus paper\u00a0\u00a0\u00a0\u00a0Alkaline gas<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se22.png\" alt=\"\"\/>Litmus paper\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0blue.<br \/>\n<img decoding=\"async\" align=\"left\" src=\"https:\/\/ecolebooks.com\/nigeria\/wp-content\/uploads\/9jalessonsimages\/100623_0818_Week7SS3Se23.png\" alt=\"\"\/>Gas  + con HCl\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0It gives white fumes with con HCl\u00a0\u00a0\u00a0\u00a0NH<sub>3<\/sub> gas from NH<sub>4<\/sub><sup>+<\/sup><\/p>\n<p>\u00a0<strong>GENERAL EVALUATION<br \/>\n<\/strong><\/p>\n<ol>\n<li>Give the common reagents used for confirmatory test for cations.\n<\/li>\n<li>State the colour of the solution when the sample that contains the following dissolve in water:\n<\/li>\n<\/ol>\n<p>a. Fe <sup>2+<\/sup>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0b. Cu <sup>2+<\/sup>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0c. Fe <sup>3+<\/sup><\/p>\n<p>\u00a0<strong>WEEKEND ASSIGNMENT<br \/>\n<\/strong><\/p>\n<ol>\n<li>\n<div>The following  give white gelatinous precipitate in NaOH except? (a) Al <sub>3+<\/sub> (b) pb<sub>2+<\/sub> (c) CU <sub>2+<\/sub>\n\t\t\t\t<\/div>\n<p>(d) Zn<sub>2+<\/sub>\n\t\t\t\t<\/li>\n<li>\n<div>One of the following gives &#8216;pop&#8217; sound when contact with lighted splint. (a) O<sub>2<\/sub> (b) H<sub>2<\/sub> (c ) NH<sub>3<\/sub>\n\t\t\t\t<\/div>\n<p>(d) CO<sub>2<\/sub>\n\t\t\t\t<\/li>\n<li>\n<div>Example of cations that gives gas during its confirmatory test is (a) SO<sub>3<\/sub><sup>2-<\/sup> (b) SO<sub>4<\/sub><sup>2-\u00a0\u00a0\u00a0\u00a0<\/sup>(c) CO<sub>3<\/sub><sup>2-<\/sup>\n\t\t\t\t<\/div>\n<p>(d) NH<sub>4<\/sub><sup>+<\/sup>\n\t\t\t\t<\/li>\n<li>Deep green colour of flame indicate the presence of (a) sodium (b) calcium\u00a0\u00a0\u00a0\u00a0(c) copper (d) iron\n<\/li>\n<li>The only alkaline gas that changes moist red litmus paper to blue is (a)NH<sub>3<\/sub>\u00a0\u00a0\u00a0\u00a0(b) HCl\u00a0\u00a0\u00a0\u00a0(c) NaOH (d) NH<sub>4<\/sub>OH\n<\/li>\n<\/ol>\n<p>\u00a0<strong>THEORY<\/strong><\/p>\n<ol>\n<li>Explain the confirmatory test for the following cations\n<\/li>\n<li>State the flame test for the following :\n<\/li>\n<\/ol>\n<p>a. Calcium\u00a0\u00a0\u00a0\u00a0b. Copper\u00a0\u00a0\u00a0\u00a0 c. sodium\u00a0\u00a0\u00a0\u00a0   d. iron<\/p>\n<p>\u00a0<strong>READING ASSIGNMENT<br \/>\n<\/strong>School Chemstry by O.Y Ababio pages 165 &#8211; 183<br \/>\nPractical chemistry by R. I. Makanjuola pages 31-36.<br \/>\nPractical Chemistry for Schools and Colleges by Godwin O. Ojokuku pages 30 \u2013 98.<\/p>\n<p>\t\t\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u00a0WEEK SEVEN TOPIC: INTRODUCTION TO QUALITATIVE ANALYSIS Introduction to Qualitative Analysis Test for carbons using&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,307],"tags":[],"class_list":["post-3946","post","type-post","status-publish","format-standard","hentry","category-posts","category-second-term-ss3-chemistry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/3946","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/comments?post=3946"}],"version-history":[{"count":1,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/3946\/revisions"}],"predecessor-version":[{"id":3947,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/posts\/3946\/revisions\/3947"}],"wp:attachment":[{"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/media?parent=3946"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/categories?post=3946"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecolebooks.com\/nigeria\/wp-json\/wp\/v2\/tags?post=3946"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}