You have a 10 stock of NaCl a 20 stock of K2HPO4 15M stock o

You have a 10% stock of NaCl, a 20% stock of K_2HPO_4, 1.5M stock of MgSO_4 and 10 mg/ml stock of vitamin B1. How many grams of NaCl would you need to weigh out to make up 200 ml of a solution?

Solution

In this question you have mentioned 4 types of chemicals and you just asked that how many grams of NaCl need to weigh to make 200 ml of solution. If you want to make 200ml of 10% NaCl solution, you have to weigh out 20g of Nacl powder and completely dissolve in a little amount of distilled water and then make up to 200ml in standard flask with distilled water.