a student is conducting a lab that requires 2 m hcl. in the chemical closet, there is 150 ml of 8 m hcl. how…

a student is conducting a lab that requires 2 m hcl. in the chemical closet, there is 150 ml of 8 m hcl. how much water must be added to stock solution to get the desired molarity for the lab? a 150 ml b 450 ml c 600 ml d 1200 ml

a student is conducting a lab that requires 2 m hcl. in the chemical closet, there is 150 ml of 8 m hcl. how much water must be added to stock solution to get the desired molarity for the lab? a 150 ml b 450 ml c 600 ml d 1200 ml

Answer

Explanation:

Step1: Use dilution formula

$M_1V_1 = M_2V_2$, where $M_1 = 8\ M$, $V_1=150\ mL$, $M_2 = 2\ M$.

Step2: Solve for $V_2$

$V_2=\frac{M_1V_1}{M_2}=\frac{8\ M\times150\ mL}{2\ M}=600\ mL$.

Step3: Calculate water volume

Volume of water added = $V_2 - V_1$. So, $600\ mL-150\ mL = 450\ mL$.

Answer:

B. 450 mL