One·four basic quantities

Solute, solvent, solution, concentration

Two·three relational expressions

(1) Solution = solute solvent

(2) Concentration = (solute/solution) × 100

(3) Solvent = solution × (1-concentration).

Generally, a linear equation of one variable can be solved

There is an inverse proportional relationship in the process of proportioning. The weight of the two solutions being mixed is inversely proportional to the change in their concentration

So there is another proportional method that is fast and accurate! ! ! !

For example, the question is like this, how to mix two solutions of different concentrations (5, 85) to get a solution of 15, 1000KG

It can be calculated like this

15-5=10, 85-15=70

So the two solutions with different concentrations use 7:1 respectively

The former 1000*(7/8)=875kg, the latter or 125kg