Concentrated hydrochloric acid is 38% , by mass, HCl in water. How
many grams of HCl are there in 25.0 g concentrated hydrochloric acid?
To find the mass of HCl in the concentrated hydrochloric acid, you need to multiply the mass of the acid by the percentage of HCl.
Step-by-step solution:
1. Convert the percentage of HCl to a decimal by dividing it by 100:
38% = 38/100 = 0.38
2. Multiply the mass of the concentrated hydrochloric acid by the decimal form of the percentage to find the mass of HCl:
Mass of HCl = Mass of acid * Percentage of HCl
Mass of HCl = 25.0 g * 0.38
Mass of HCl = 9.5 g
Therefore, there are 9.5 grams of HCl in 25.0 grams of concentrated hydrochloric acid.