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 answers to the questions: 26. Three observations made during the reaction are: • The blue colour of the copper (II) sulphate solution fades or turns green. • A reddish-brown solid (copper) is deposited. • The iron fillings decrease in size or disappear. 27. i) Chemical test: • Add anhydrous copper (II) sulphate. If water is present, it will turn from white to blue. ii) Physical test: • Determine its boiling point. Pure water boils at 100^ at standard atmospheric pressure. 28. a) Select elements found in; i) the same group: • W and U (Both are in Group 2, having 2 valence electrons). ii) period three: • X, U, and Y (All have 3 electron shells). b) What is the family name given the group members to which element Y belongs: • Halogens (Element Y has 7 valence electrons, placing it in Group 17). Last free one today — make it count tomorrow, or type /upgrade for unlimited.