Prepare a step by step process to prepare 500 grams of a 5% HCl aqueous solution. (Assume 37% by mass HCl stock solution is used)© BrainMass Inc. brainmass.com October 10, 2019, 5:51 am ad1c9bdddf
5% aqueous HCl solution means that in 100g of solution, 5g of that solution is HCl (5/100 = 5%).
37% stock means that in 100g of solution, 37g is HCl (37/100 = 37%).
Conversely, it might be easier to consider that ratio as: 0.5g of HCl per 1g final solution (5/100) and 1g HCl per 2.7g stock (100/37). What we've done here is identify easy ratios of HCl to final solution for the purpose of our calculations:
0.5g HCl : 1g ...
This solution discusses the steps for preparing an HCl solution in 332 words.