[bored]

Hi,
I am given solution A of 20X conc and solution B of 10% conc.
I need to make a new solution - C consisting of sol. A conc 2X and sol. B conc 0.5%.
How much of each solution do i need to make 1 litre of solution c and how much water is needed?

I can and have done the dilutions to get A and B to their respective calculations but am not sure on how to mix them to produce a litre of C.

Can i just add the required amounts of A and B, then add water to make to vol to 1 litre?

[AWK]

Hint
The first solution should be diluted 10 times, the second one - 20 times.

[bored]

Thanks 4 that
i have worked out that I need 100ml of A  to 900ml of water to get the correct dilution
and 50ml of B with 950ml of water. When making the final solution do i need 100ml of a 50ml of B and 850ml of water? I am puzzled by whether the 50ml of solution B is part of the dilutant for solution A and vica versa

[AWK]

I understand it in different way:
100 mL of solution A, 50 mL of solution B and water up to 1000 mL (aprox 850 mL)