Eli5: what is exactly is molarity.

Question

if you have 2 solutions for example
50ml of 0.5M of a solution (A)
and 0.25M of 100ml of a solution (B)
Would the new volume be 150ml or 0.150L
And would I have to change the molarity of solutions A and B

In: 2

Answer 1

I just wanna say that those of you who understand this are amazing. I’m a pretty educated person but this is like a foreign language to me. You should be proud of yourselves.