Hello, I'm an MD preparing herself to start a PhD in molecular biology, last time I really studied chemistry was in HS, but I do need to cover some basics for the admision test. I've been reviewing Normal solutions, I thought I had them, but then I did some excercises and I didnt get them right, and Im not sure where the problem is, would anyone be kind enough to help?
These are the questions: (translated from spanish, sorry if there are any syntax mistakes)
1. What normality will have a 600ml solution that has 45g of hydrochloric acid?
For this one I used a MW of 36.458g/mol, and my result was 0.486N (pEq = 36.458 g/Eq, N=75g/L) The correct answer was 2.05N
2. How many grams of solute is needed to prepare 1 litre of 0.1N of H2SO4?
For this one I used a MW of 98g/mol, and my result was 1.66g (pEq = 16.33g/Eq) The correct answer was 4.9g