This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Here are the observations and conclusions for the exercises on compounds C and D: a) Tests on C (organic compound): i) Observation: Blue litmus paper turns red, and red litmus paper remains red. Conclusion: The solution is acidic. ii) Observation: To the second portion, adding Fehling's solution A and B and boiling, a brick-red precipitate forms. Conclusion: A reducing sugar (or aldehyde functional group) is present. b) Tests on D (inorganic compound): i) Observation: When heated, a colorless gas is evolved which turns limewater milky. The solid residue is yellow when hot and white when cold. Conclusion: Carbonate ions (CO_3^2-) are present. The solid is likely zinc oxide (ZnO). ii) Observation: To the second portion, adding dilute HCl causes effervescence, and a colorless gas is evolved which turns limewater milky. The solid dissolves to form a colorless solution. Conclusion: Carbonate ions (CO_3^2-) are present. iii) Observation: To the first portion from 2(b)(ii), adding NaOH_(aq) dropwise produces a white precipitate. The precipitate dissolves when excess NaOH_(aq) is added, forming a colorless solution. Conclusion: Zn^2+, Al^3+, or Pb^2+ ions are present. iv) Observation: To the second portion from 2(b)(ii), adding NH_3(aq) dropwise produces a white precipitate. The precipitate dissolves when excess NH_3(aq) is added, forming a colorless solution. Conclusion: Zn^2+ ions are present. Last free one today — make it count tomorrow, or type /upgrade for unlimited.