Mimi_x3 Group Title A student wishes to dilute 50ml of a solution 0f 0.10 mol L^-1 calcium chloride to obtain ion concentrate of 0.02 mol L^-1. What is the volume of the diltuted solution ? Can someone pls explain step by step (: 2 years ago 2 years ago

1. Osirisis Group Title

$\frac{mol}{L}=M$ You can use the following formula to answer this: $M_1V_1=M_2V_2$ Note that V is handled in terms of L so we times the 50ml by 10^{-3}. $0.10M*50(10^{-3})L=0.02M*V_2$ We need to solve for V_2 so we will divide both sides by 0.02. $\frac{0.10M*50(10^{-3})L}{0.02M}=V_2$ Notice that the M cancel and we are left with L which is what we are seeking. $0.25L=V_2$ This can also be written as: $V_2=250ml$ Now if you approach this logically, we're looking to dilute a concentration because the Molarity is going down. The implication here is that we have to add more water so our volume will go up. Note that we have a larger volume for V_2 than V_1.

2. Mimi_x3 Group Title

wow~ ty Osirisis (:

3. Osirisis Group Title

Happy to help. It lets me practice what I learned over the summer :)

4. Mimi_x3 Group Title

lols okay (: