calthe culate mass of 10% stock solution required to prepare 0.8kg of 4%solution
The dilution formula works for this.
10*x = 4*800
Solve for x = 320 g of the 10% and make to 800 g total.
10*x = 4*800
Solve for x = 320 g of the 10% and make to 800 g total.