Usually HCl is sold as a solution, and figuring out how to prepare necessary dilutions could be tricky. You can proceed to calculations if you already know how to do it; if not, we will try to do it step by step: a. Calculate the theoretical dry mass in grams of HCl to make 100 ml of 10 mM solution of HCl, as if it was not liquid, but solid. b. Since HCl is sold as liquid, we need to measure the amount of stock HCl in ml, not in grams. If the density of HCl solution is 1.27 g/ml, how many ml of liquid 100% HCl do you need to prepare 100 ml of 10 mM solution of HCl? Here you will need to take the amount of grams from the previous step and calculate the amount of ml using the provided density. c. Now, you have to adjust your calculations, since you actually have a 37% HCl solution. This is how HCl is normally sold. You will need to increase the amount of ml you calculated in the previous step accordingly to prepare the solution you need.
Usually HCl is sold as a solution, and figuring out how to prepare necessary dilutions could be tricky. You can proceed to calculations if you already know how to do it; if not, we will try to do it step by step:
a. Calculate the theoretical dry mass in grams of HCl to make 100 ml of 10 mM solution of HCl, as if it was not liquid, but solid.
b. Since HCl is sold as liquid, we need to measure the amount of stock HCl in ml, not in grams. If the density of HCl solution is 1.27 g/ml, how many ml of liquid 100% HCl do you need to prepare 100 ml of 10 mM solution of HCl? Here you will need to take the amount of grams from the previous step and calculate the amount of ml using the provided density.
c. Now, you have to adjust your calculations, since you actually have a 37% HCl solution. This is how HCl is normally sold. You will need to increase the amount of ml you calculated in the previous step accordingly to prepare the solution you need.
d. Calculate the theoretical pH of this solution (HCl is a strong acid and dissociates completely
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