Question

What is the molarity when 50.0 mL of 2.0 M NaOH is diluted to 150 mL?

6.0 M


0.67 M


1.0 M


1.5 M

Answer 1

50*2=150*M
M=150/100=1.5M

Answer 2

Answer: The molarity of concentrated NaOH solution is 6 M

Step-by-step explanation:

To calculate the molarity of the concentrated 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 concentrated NaOH solution

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

We are given:

`M_1=?M\\V_1=50.00mL\\M_2=2.0M\\V_2=150mL`

Putting values in above equation, we get:

`M_1* 50.00=2.0* 150.0\\\\M_1=(2.0* 150)/(50)=6M`

Hence, the molarity of concentrated NaOH solution is 6 M