Question

how many liters of solution are required to prepare a 0.20 m solution containing 0.40 mol of naoh?
a 0.20 l
b 1.0 l
c 2.0 l
d 0.10 l

Explanation:

Step1: Recall the formula for molarity

Molarity ($M$) is defined as $M=\frac{n}{V}$, where $n$ is the number of moles and $V$ is the volume of the solution in liters. We need to solve for $V$.

Step2: Rearrange the formula to solve for $V$

From $M = \frac{n}{V}$, we can get $V=\frac{n}{M}$.

Step3: Substitute the given values

Given $n = 0.40\ mol$ and $M=0.20\ M$. Then $V=\frac{0.40\ mol}{0.20\ mol/L}$.

Step4: Calculate the value of $V$

$V = 2.0\ L$.

Answer:

C. 2.0 L