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Bleach is a solution of sodium hypochlorite (NaClO) - AQA - GCSE Chemistry Combined Science - Question 6 - 2018 - Paper 2
Question 6
Bleach is a solution of sodium hypochlorite (NaClO). Chlorine gas is produced when bleach reacts with hydrochloric acid. NaClO(aq) + 2HCl(aq) ⇌ NaCl(aq) + H2O(l) + ... show full transcript
Worked Solution & Example Answer:Bleach is a solution of sodium hypochlorite (NaClO) - AQA - GCSE Chemistry Combined Science - Question 6 - 2018 - Paper 2
Step 1
Step 2
Step 3
The stopper in Figure 8 is removed and hydrochloric acid is added. The stopper is replaced. Explain what happens to the equilibrium.
Answer
Upon removing the stopper and adding hydrochloric acid, the system is disturbed. The equilibrium shifts to the right-hand side to favor the forward reaction in order to produce more products. The new equilibrium will be established once the system is allowed to rest.
Step 4
Predict the effect of increasing the temperature on the amount of chlorine gas produced at equilibrium.
Answer
Increasing the temperature will result in an increase in the amount of chlorine gas produced at equilibrium. This is because the forward reaction is endothermic, and according to Le Chatelier's Principle, the system will shift to absorb the added heat.
Step 5
Explain the effect of increasing the pressure on this equilibrium.
Answer
Increasing the pressure will have no effect on the equilibrium position because the number of gas molecules on both sides of the reaction is equal. The equilibrium will remain unchanged as there are equal moles of gas on each side.