Question

Which of the following solutions contains same molar concentration?

• A. $166 \,g$. KI/L solution
• B. $33.0\, g \left( NH _4\right)_2 SO _4$ in $200\, mL$ solution
• C. $25.0\, g\, CuSO _4 \cdot 5 H _2 O$ in $100\, mL$ solution
• D. $27.0\, mg\, Al ^{3+}$ per $mL$ solution

Answer 1

Answer: (A), (C), (D)

a. $M=\frac{166 \times 1000}{166 \times 1000}=1.0\, M$
b. $M=\frac{33 \times 1000}{132 \times 200}=1.25\, M$
c. $M=\frac{25 \times 1000}{250 \times 100}=1.0 \,M$
d. $M=\frac{27 \times 10^{-3} \times 1000}{27 \times 1}=1.0 \,M$