Question

What is the molarity of a solution with a volume of 974 mL containing 17 g of CuSO4?

A. 0.0001M CuSO4
B. 2.79M CuSO4
C. 0.109M CuSO4
D. 9.66M CuSO4

Answer 1

@JoannaBlackwelder

Answer 2

Any ideas on how to start? Do you know what molarity is?

Answer 3

I'm not going to lie to you, when numbers come into play with science, i get very confused. So, im not really that sure the correct way to start..

Answer 4

Ok, no worries.
\[Molarity = \frac{ Moles Solute }{ LiterSolution }\]

Answer 5

Can you find how many liters of solution we have?

Answer 6

So, are you dividing 974 by 17?

Answer 7

No...we are given that we have 974 mL, so we need to convert that to liters.

Answer 8

Since there are 1000 mL in a Liter, we have .974 L.

Answer 9

Make sense so far?

Answer 10

Yes it does

Answer 11

:D

Answer 12

Then we need to calculate the moles of CuSO4.

Answer 13

We do that by starting with the grams we are given, and find the molar mass from the periodic table to convert to moles.

Answer 14

Do you know how to do that?

Answer 15

I'm trying to lol

Answer 16

:) Ok. Let me know what you get.

Answer 17

Whats the compound or element I need to convert? Lol

Answer 18

CuSO4

Answer 19

From grams to moles :D

Answer 20

The molar mass is 159.6086 correct?

Answer 21

Yes, great!

Answer 22

The correct answer is between A and C right? I can automatically rule out B and D?

Answer 23

Sorry, just a minute.

Answer 24

Okay. because i converted the 17 grams into moles and I got 0.10651055143653..

Answer 25

The answer I am thinking is C

Answer 26

Yep, I get C too! :D