Question

To 225 mL of a 0.80M solution of KI, a student adds enough water to make 1.0L of a more dilute KI solution. What is the molarity of the new solution? A.180M B. 2.8M C. 0.35M D. 0.18M

Answer 1

Hope this helps you!

Answer 2

Answer: The correct answer is Option D

Step-by-step explanation:

To calculate the molarity of the diluted 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 solution

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

We are given:

Conversion factor: 1 L = 1000 mL

`M_1=0.80M\\V_1=225mL\\M_2=?M\\V_2=1L=1000mL`

Putting values in above equation, we get:

`0.80* 225=M_2* 1000\\\\M_2=0.18M`

Hence, the correct answer is Option D