No.138 Mixtures and Concentration
Example
How many grams of 4% and 10% salt solution should be mixed to make 600 g of 8% salt solution?
POINT
Let the amounts of the two salt solutions be represented by variables. Use the total mass of the mixture and the total mass of salt it contains as the two conditions for your equations.
200 g of 4% solution and 400 g of 10% solution
TRY
TRY 1
How many grams each of 3% and 9% salt solution are needed to make 400 g of 6% salt solution?
3％ 200g、9％ 200g
TRY 2
How many grams each of 5% and 15% salt solution are needed to make 500 g of 11% salt solution?
5％ 200g、15％ 300g