to prepare for a lab experiment, brad is making a solution that uses two types of concentrations: 75 ml of…

to prepare for a lab experiment, brad is making a solution that uses two types of concentrations: 75 ml of 50% salt and 125 ml of 10% salt. what is the salt concentration of the mixed solution? a.) 16% b.) 35% c.) 25%

to prepare for a lab experiment, brad is making a solution that uses two types of concentrations: 75 ml of 50% salt and 125 ml of 10% salt. what is the salt concentration of the mixed solution? a.) 16% b.) 35% c.) 25%

Answer

Explanation:

Step1: Calculate salt amount in 50% solution

The amount of salt in 75 mL of 50% salt solution is $75\times0.5 = 37.5$ mL.

Step2: Calculate salt amount in 10% solution

The amount of salt in 125 mL of 10% salt solution is $125\times0.1=12.5$ mL.

Step3: Calculate total salt amount

The total amount of salt is $37.5 + 12.5=50$ mL.

Step4: Calculate total solution volume

The total volume of the mixed - solution is $75 + 125 = 200$ mL.

Step5: Calculate the concentration of the mixed solution

The concentration of the mixed solution is $\frac{50}{200}\times100%=25%$.

Answer:

c. 25%