[TheGreenOne]

Can anyone help me figure out this problem for me?

What is the mass percent sucrose in the solution obtained by mixing 225g of an aqueous solution that is 6.25% sucrose by mass with 135 g of an aqueous solution that is 8.20% sucrose by mass.

I came up with an answer, but was not correct judging from th eback of the book.  Anyone wanna give me an explanation on how you came up with it as well.

I will probably be asking many questions due to exam.

[Borek]

You need total mass of the mixture and total mass of solute. Both can be easily calculated from the data given.

[The Tao]

If you have 100g of a solution, and it's solute's wt % is 11%, then

100g*(.11)= mass of *solute*

[TheGreenOne]

I am getting 6.98% in the back of the book but I'm getting 14.5% with my calculation.

[invisiblegs]

This problem can be solved using a simple weighted average calculation.  Calculate the sucrose contribution made by each solution and divide by the total amount of solution.  The book answer looks correct to me.

[Borek]

I am getting 6.98% in the back of the book but I'm getting 14.5% with my calculation.

Show your work.