- ARapidly changes pH due to addition of an acid.
- BResists changes in pH.
- CDoes not change pH at all.
- DChanges pH only with the addition of a strong base.
Explanation:
The solution of buffer resists changes in pH.
A buffer solution is defined as a solution which resists drastic changes in pH upon the addition of a small amount of either an acid or a base.
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${C_{\left( s \right)}} + {H_2}{O_{\left( g \right)}} \rightleftharpoons C{O_{\left( g \right)}} + {H_{2\left( g \right)}}$
$(a)\,\,{N_2}(g) + {O_2}(g) \rightleftharpoons \,\,2NO(g); $ $\Delta {H^o}\, = \,181\,\,kJ$
$(b)\,\,2C{O_2}(g)\,\,\,\, \rightleftharpoons \,2CO(g)\, + \,{O_2}(g);$ $\Delta {H^o}\, = \,566\,\,kJ$
$(c)\,\,{H_2}(g) + {I_2}(g) \rightleftharpoons \,2HI(g) ;$ $\Delta {H^o}\, = \,-9.4\,\,kJ$
$(d)\,\,{H_2}(g) + {F_2}(g) \rightleftharpoons \,2HF(g) ;$ $\Delta {H^o}\, = \,-541\,\,kJ$