Ion and Pb2+ Ions Essay

Experiment 14 point Purpose Procedure Qualitative outline To determine the cations and anions of inorganic substances (a) Solids KA1 and KA2 are frank salts. Carry out the hobby experiments with inviolable KA1 to identify its cation and anion. (b) You are then postulate to carry out a some experiments to identify the cation and anion present in significant KA2. In all the experiments, the reagent should be added in stages until no further change is observed. reason what you can about KA1 and KA2. Observations should include elaborate of colour changes, comes, and tests on gases evolved. tryouts on KA1 Test (a) furnish subjugate hydrochloric sexually transmitted disease to a small amount of solid KA1, then warm gently.(b) Dissolve solid KA1 in distilled pee and filter. Use separate portions of the extend for the following tests. (i) enlarge aqueous atomic number 11 hydroxide, then in excess. (ii) Add aqueous ammonia, then in excess followed by aqueous ammoni um chloride. (iii) Add aqueous iron (III) chloride, then warm. (iv) Add aqueous silver nitrate, followed by dilute nitrous acid. (v) Add aqueous disodium hydrogen phosphate. (vi) Add aqueous potassium chromate (VI) followed by dilute hydrochloric acid. Observation replys smells like vinegar. Deduction event contains CH3COO- ions.A gaberdine precipitate is formed. stem turns cloudy and a white precipitate is formed. dissolver contains either Pb2+ ions, Zn2+ ions or Al3+ ions. effect contains either Pb2+ ions or Al3+ ions. upshot contains CH3COO- ions. Solution contains CH3COO- ions. Solution contains Pb2+ ions. Solution contains Pb2+ ions.Solution turns brown and a white precipitate is formed. A white precipitate is formed.Solution turns white and a white precipitate is formed. A yellow precipitate is formed. individuality of KA1 KA1 contains Pb2+ ions and CH3COO- ions. Tests on KA2 Test (a) Add concentrated hydrochloric acid and test for gas(es) evolved by using calcium oxid e water. (b) Dissolve KA2 in dilute nitric acid. Use separate portions of the solution for the following tests. (i) Add dilute sodium hydroxide. (ii) Add potassium hexacyanoferrate (II). Observation Lime water turns chalky. Deduction The reaction releases carbon dioxide gas. Solution contains CO32- ions.A blue precipitate is formed. Solution turns dark brown.Solution contains Cu2+ ions. Solution contains Cu2+ ions.Identity of KA2 KA2 contains Cu2+ ions and CO32- ions.