Two answers

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Baiwen Wang 4G
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Joined: Fri Sep 26, 2014 2:02 pm

Two answers

Postby Baiwen Wang 4G » Sun Oct 19, 2014 8:38 pm

I want to ask why this type of question has two solutions, for example on workbook Quiz 1 Preparation Fall 2012 Q10, there are two answers, one for CaCl2 and one for AgNO3. I think only the one for AgNO3 should count, because it is limiting reactant, right? I am confused. Thanks for helping me!

K Honeychurch 1K
Posts: 27
Joined: Fri Sep 26, 2014 2:02 pm

Re: Two answers

Postby K Honeychurch 1K » Sun Oct 19, 2014 9:51 pm

The two answers is just a way to determine which reactant is the limiting one. Since the amount of CaCl2 given would yield 9.5 g AgCl and the amount of AgNO3 given would yield 3.9 g AgCl, we know that AgNO3 is the limiting reactant (since it yields less AgCl). And we now know that this reaction would result in 3.9 g AgCl. But you're right, you only need the second answer. Hope that helps.

Quynh Nguyen 2O
Posts: 27
Joined: Fri Sep 26, 2014 2:02 pm

Re: Two answers

Postby Quynh Nguyen 2O » Fri Nov 14, 2014 5:20 pm

^ Yes, what the comment said above is correct.

But going off what she said, you always use the limiting reactant to find the mass of the product since that is the one you're gonna run out of first.


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