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### Test 1 Q.1

Posted: Sun May 06, 2018 11:42 am
Anhydrous calcium chloride is a salt which is used increasing water hardness in swimming pools. A solution of CaCl2 is prepared by dissolving 4.00 g of salt to 1.00 L water. What is the concentration of chloride ions for the above solution?

b) The above solution is diluted with 1.00 L of 0.400 M potassium chloride, KCl solution. What is the concentration of chloride ions after the dilution?

### Re: Test 1 Q.1

Posted: Sun May 06, 2018 12:07 pm

Here's my solution for A

### Re: Test 1 Q.1

Posted: Sun May 06, 2018 12:21 pm
And here's my solution for B!

For these problems, plugging into the equation M = moles / volume is straightforward, but I think the hardest part is making sure you're using the right value for number of moles. Make sure to calculate the number of moles for the element you want by looking at its ratio within the given compound.

### Re: Test 1 Q.1

Posted: Sun May 06, 2018 12:34 pm
Thank you so much this is very much appreciated!