The table shows the results of all the tests.MetalcompoundFlame test Aqueous acidifiedsilver nitrateAqueous acidifiedbarium chlorideAqueoussodium hydroxideX yellow white precipitate no precipitate no precipitateY red no precipitate white precipitate no precipitateZ no colour no precipitate no precipitate Green precipitate(i) Give the name of compound X and of compound Y.compound Xcompound Y(ii) Identify the cation present in compound Z.(c) Describe a chemical test, other than heating, that could be used to show that compound Zcontains carbonate ions.testresult
Question
The table shows the results of all the tests.MetalcompoundFlame test Aqueous acidifiedsilver nitrateAqueous acidifiedbarium chlorideAqueoussodium hydroxideX yellow white precipitate no precipitate no precipitateY red no precipitate white precipitate no precipitateZ no colour no precipitate no precipitate Green precipitate(i) Give the name of compound X and of compound Y.compound Xcompound Y(ii) Identify the cation present in compound Z.(c) Describe a chemical test, other than heating, that could be used to show that compound Zcontains carbonate ions.testresult
Solution
The question seems to be asking for the identification of compounds X, Y, and Z based on their reactions in various tests.
(i) Compound X shows a yellow flame test, which is characteristic of Sodium ions. The white precipitate in aqueous acidified silver nitrate indicates the presence of Chloride ions. Therefore, compound X is Sodium Chloride.
Compound Y shows a red flame test, which is characteristic of Lithium ions. The white precipitate in aqueous acidified barium chloride indicates the presence of Sulfate ions. Therefore, compound Y is Lithium Sulfate.
(ii) Compound Z does not show any color in the flame test or any precipitate in the first two tests, but forms a green precipitate with aqueous sodium hydroxide. This indicates the presence of Iron(II) ions. Therefore, the cation present in compound Z is Iron(II).
(c) To test for the presence of carbonate ions in compound Z, you could add dilute hydrochloric acid (HCl) to a sample of the compound. If carbonate ions are present, the reaction will produce carbon dioxide gas, which can be observed as effervescence (bubbling).
Test: Add dilute hydrochloric acid to a sample of compound Z. Result: If carbonate ions are present, effervescence will be observed due to the production of carbon dioxide gas.
Similar Questions
The three metal compounds are also tested separately with three reagents:● aqueous acidified silver nitrate● aqueous a acidified barium chloride● aqueous sodium hydroxideThe table shows the results of all the tests.MetalcompoundFlame test Aqueous acidifiedsilver nitrateAqueous acidifiedbarium chlorideAqueoussodium hydroxideX yellow white precipitate no precipitate no precipitateY red no precipitate white precipitate no precipitateZ no colour no precipitate no precipitate Green precipitate(i) Give the name of compound X and of compound Y.compound Xcompound Y(ii) Identify the cation present in compound Z.
Compound X, A, B & C respectively are :CH3COONa, Na2ZnO2, NaOH, NaClNaOH, Na2ZnO2, NaCl, CH3COONaNa2ZnO2, CH3COONa, NaCl, NaOHNaOH, NaCl, Na2ZnO2, CH3COONa
When carrying out a flame test, which cation is identified by a yellow flame? Hydrogen, H+Copper II, Cu2+Sodium, Na+Lithium, Li+2What is meant by the term ‘precipitate’? Insoluble solidColourless gasClear solutionColoured solution3Which metal ions all form white precipitates when added to sodium hydroxide solution? Al3+, Na+ and K+Li+, Na+ and K+Al3+, Mg2+ and Cu2+Al3+, Mg2+ and Ca2+4How would you test whether a white precipitate formed in sodium hydroxide solution is the calcium Ca2+ ion?Does not dissolve in excess NaOH, burns with an orange-red flameDissolves when excess NaOH addedDoes not dissolve in excess NaOH, burns with no colourDoes not dissolve in excess NaOH, burns with a crimson flame5Which metal ion forms a green precipitate when added to sodium hydroxide solution?Copper (II), Cu2+Copper (I), Cu+Iron (III), Fe3+Iron (II), Fe2+6What is the balanced equation, with state symbols, for the reaction of iron(II) chloride with sodium hydroxide solution? FeCl (aq) + 2NaOH (aq) → 2NaCl (aq) +Fe(OH)2 (s)FeCl2 (aq) + NaOH (aq) → NaCl (aq) +FeOH (s)FeCl2 (aq) + 2NaOH (aq) → 2NaCl (aq) +Fe(OH)2 (s)Fe2Cl2 (aq) + 2NaOH (aq) → 2NaCl (aq) +2FeOH (s)
Question 9 of 10675%A scientist adds sodium hydroxide solution to a solution of compound Y. A white precipitate forms. Which of the options below correctly shows the metals that compound Y could contain?
A colorless aqueous solution contains nitrates of two metals, X and Y. When it was added to an aqueous solution of NaCl, a white precipitate was formed. This precipitate was found to be partly soluble in hot water to give a residue P and a solution Q. The residue P was soluble in aq. NH3 and also in excess sodium thiosulfate. The hot solution Q gave a yellow precipitate with KI. The metals X and Y, respectively, are4 pointsAg and PbAg and CdCd and PbCd and Zn
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