Which solution is more concentrated?

Question

1.05 x 10^-5M or 1.05 x 10⁴M

Answer 1

The higher the molarity (M) the higher the concentration. So here we have the following two concentrations: 1.05 * 10^-5 M vs. 1.05*10⁴ M.

1.05*10⁴ M will have the higher concentration here is why...

Lets plug and chug into calculator:

1.05 * 10^-5 = 0.000011

1.05*10⁴ = 10500

Here we should note that 10500 is a larger number than 0.000011

I like to think of molarity as money would you prefer to have $10500 or $0.000011? Hopefully you are thinking $10500 lol

**NOW if 1.05 * 10^-5 were 1.05 * 10⁺⁵ we would get a value of 105000 which would be greater than 1.05*10⁴ (10500) AND we would say 1.05 * 10⁺⁵ M has a higher molarity therefore higher concentration than 1.05*10⁴ M!**

Hope this helps! :)

Answer 2

For this question, we have to remember that M = moles per liter. M is molarity, a measure of concentration. Therefore, the value that is higher will be more concentrated. The second value is a higher number, so therefore 1.05 x 10⁴ M is more concentrated