Question

what volume of a 0.100 m hcl stock solution should be used to prepare 250.00 ml of 0.0250 m hcl?
a 1.00 ml
b 16.0 ml
c 62.5 ml
d 100. ml

Explanation:

Step1: Recall dilution formula

$M_1V_1 = M_2V_2$

Step2: Identify given values

$M_1=0.100\ M$, $V_2 = 250.00\ mL$, $M_2=0.0250\ M$

Step3: Solve for $V_1$

$V_1=\frac{M_2V_2}{M_1}=\frac{0.0250\ M\times250.00\ mL}{0.100\ M}= 62.5\ mL$

Answer:

C. 62.5 mL