Calculate the mass of a 5% sodium carbonate solution and the mass of crystalline soda

Calculate the mass of a 5% sodium carbonate solution and the mass of crystalline soda, which are required to obtain 200 g of a 10% sodium carbonate solution.

ω = mst / mst * 100%, where mst is the mass of the solute, mst. – the mass of the solution

Determine how much sodium carbonate and water is in the final solution

mpl = ω * mst / 100%

ming = 10% * 200g / 100% = 20g. sodium carbonate in the final solution,

otsuda 200 – 20 = 180g. water in the final solution.

At 100g. this 5% – solution of 5g. carbonate and 95g. water,

X g – 180 g of water,

X = 9.5g. sodium carbonate

The mass of the required 5% solution is 9.5 g. + 180g. = 189.5g.

To get 200g. 10% – the solution must be added 20 – 9.5 = 10.5 g. soda

Answer: 189.5g. 5% – sodium carbonate solution and 10.5 g. crystalline soda