(a)[1]
What does a catalyst do?
(b)[1]
Complete the equation below by inserting the sign for a reversible reaction. $N_2 + 3H_2$ $2NH_3$
(c)[1]
State whether this reaction is exothermic or endothermic, and give a reason for your answer.
(d(i))[1]
Describe how the percentage yield of ammonia varies with temperature.
(d(ii))[1]
Determine the percentage yield of ammonia at $350^\circ C$.
(e)[2]
Describe a test for ammonia. test [BLANK] outcome [BLANK]
(f)[2]
Describe how you would use Universal Indicator to measure the pH of an aqueous solution of a weak base.
(g)[2]
Complete the chemical equation for ammonia reacting with chlorine. [BLANK]NH$_3$ + 3Cl$_2$ $\rightarrow$ N$_2$ + [BLANK]HCl