4. (d) Write an equation for the reaction of:
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 solutions to the questions:
4. (d) Write an equation for the reaction of:
(i) Carbon dioxide with aqueous potassium hydroxide.
$$\boxed{\text{CO}_2(g) + 2\text{KOH}(aq) \to \text{K}_2\text{CO}_3(aq) + \text{H}_2\text{O}(l)}$$
(ii) Germanium monoxide with dilute hydrochloric acid.
$$\boxed{\text{GeO}(s) + 2\text{HCl}(aq) \to \text{GeCl}_2(aq) + \text{H}_2\text{O}(l)}$$
4. (e)
(i) Give the formula of the stable oxides of the elements of Period 3 in the table below.
| Symbol of element | Na | Mg | Al | Si | P | S | Cl | Ar |
| :---------------- | :- | :- | :-- | :-- | :---- | :-- | :------ | :-- |
| Formula of oxide | $\boxed{\text{Na}_2\text{O}}$ | $\boxed{\text{MgO}}$ | $\boxed{\text{Al}_2\text{O}_3}$ | $\boxed{\text{SiO}_2}$ | $\boxed{\text{P}_4\text{O}_{10}}$ | $\boxed{\text{SO}_3}$ | $\boxed{\text{Cl}_2\text{O}_7}$ | $\boxed{\text{None}}$ |
(ii) From the table above, select an amphoteric oxide and write balanced equations to show its reactions with hydrochloric acid and sodium hydroxide.
Amphoteric oxide: $\boxed{\text{Al}_2\text{O}_3}$
Reaction with $\text{HCl}(aq)$:
$$\boxed{\text{Al}_2\text{O}_3(s) + 6\text{HCl}(aq) \to 2\text{AlCl}_3(aq) + 3\text{H}_2\text{O}(l)}$$
Reaction with $\text{NaOH}(aq)$:
$$\boxed{\text{Al}_2\text{O}_3(s) + 2\text{NaOH}(aq) + 3\text{H}_2\text{O}(l) \to 2\text{Na}\text{Al}(\text{OH})_4}$$
