Rate of reaction questions?

The reaction between ammonium chloride and sodium nitrite in aqueous solution can be represented by the following equation. NH4Cl(aq) + NaNO2(aq) → N2(g) + 2H2O(l) + NaCl(aq) The graph generally shows the volume of nitrogen gas produced at 30 second intervals from a mixture of ammonium chloride and sodium nitrite... show more The reaction between ammonium chloride and sodium nitrite in aqueous solution can be
represented by the following equation.
NH4Cl(aq) + NaNO2(aq) → N2(g) + 2H2O(l) + NaCl(aq)
The graph generally shows the volume of nitrogen gas produced at 30 second intervals from
a mixture of ammonium chloride and sodium nitrite in aqueous solution at 20°C.
(a) (i) State how the rate of formation of nitrogen changes with time. Explain your
answer in terms of collision theory.
(ii) Explain why the volume eventually remains constant.
(b) (i) State how the rate of formation of nitrogen would change if the temperature
were increased from 20°C to 40°C.
(ii) State two reasons for the change described in (b)(i) and explain which of the
two is more important in causing the change.
(iii) The reaction between solid ammonium chloride and aqueous sodium nitrite
can be represented by the following equation.
NH4Cl(s) + NaNO2(aq) → N2(g) + 2H2O(l) + NaCl(aq)
State and explain how the rate of formation of nitrogen would change if the
same amount of ammonium chloride was used as large lumps instead of as a
fine powder.
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