Question

Which statement is true for solution of 0.020 M $\mathrm { H } _ { 2 } \mathrm { SO } _ { 4 }$.

• A. 2 litre of the solution contains 0.020 mole of $\mathrm { SO } _ { 4 } ^ { 2 - }$
• B. 2 litre of the solution contains 0.080 mole of $\mathrm { H } _ { 3 } \mathrm { O } ^ { + }$
• C. 1 litre of the solution contains 0.020 mole $\mathrm { H } _ { 3 } \mathrm { O } ^ { + }$
• D. None of these

Answer 1

Answer: (B)

2 litre of the solution contains 0.080 mole of $\mathrm { H } _ { 3 } \mathrm { O } ^ { + }$

Answer 2

$\left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] = 2 \times 0.02 = 0.04 \mathrm { M }$

2 litre solution contains 0.08 mole of $\mathrm { H } _ { 3 } \mathrm { O } ^ { + }$.