How many moles of Cu2+ are present in 200mL of a 0.250M solutions of CuSO4?? I know the answer is 0.05 but how do I solve it?

Question

jebonna · Answer

First write the equation and break it up into its ions:
$$CuSO _{4} \rightarrow Cu ^{2+} + SO _{4}^{2-}$$

Now work out the moles of CuSO4:
$$n(moles) = C (concentration) \times V (volume)$$
Plug in the values of the concentration and the volume in the question and you will end up with your answer when using mL instead of L

So, 1mL = 0.001L
Divide your answer by 1000 to get the amount of moles when using the units in L

As they react on a 1:1 ratio, the moles of CuSO4 will be the same as the no. of moles of Cu2+ and that will be your answer.

I hope this helps!