Silver is a transition element. Potassium is a Group I metal in the Periodic Table. State two differences between the physical properties of silver and potassium.
An ion of silver is represented by $^{109}_{47}\text{Ag}^+$. Deduce how many protons, neutrons and electrons this ion contains.
Potassium reacts with water to produce a gas that makes a ‘pop’ with a lighted splint. Complete the equation for this reaction. $\dots\,\text{K} + \dots\,\text{H}_2\text{O} \rightarrow 2\text{KOH} + \dots$
An equilibrium mixture is produced when zinc carbonate is heated in a closed container. $\text{ZnCO}_3(s) \rightleftharpoons \text{ZnO}(s) + \text{CO}_2(g)$ The forward reaction is endothermic. Describe and explain the effect, if any, on the position of equilibrium when the temperature is decreased.
Describe and explain the effect, if any, on the position of equilibrium when the concentration of carbon dioxide is increased.