Question

A student needs to prepare 2.0 liters 0.60 M NaOH solution from a 8.0 M NaOH stock solution. How many milliliters of stock solution should the student use?(1 point)

A.150 mL
B.225 ml
C.250 mL
D.275 mL

Answer 1

Answer: The volume of stock solution of NaOH that the student should use is 150 mL

Explanation:

To calculate the volume of stock solution, we use the equation:

$M_1V_1=M_2V_2$

where,

$M_1\text{ and }V_1$ are the molarity and volume of the stock NaOH solution

$M_2\text{ and }V_2$ are the molarity and volume of diluted NaOH solution

We are given:

$M_1=8.0M\\V_1=?L\\M_2=0.60M\\V_2=2.0L$

Putting values in above equation, we get:

$8.0\times V_1=0.60\times 2.0\\\\V_1=\frac{0.60\times 2.0}{8.0}=0.15L=150mL$

Conversion factor used:  1 L = 1000 mL

Hence, the volume of stock solution of NaOH that the student should use is 150 mL

Answer 2

Answer:it’s A

Explanation: