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Christine Honda 2I
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Postby Christine Honda 2I » Sun Oct 06, 2019 9:33 pm

G.7 You need to prepare 510. g of an aqueous solution containing 5.45% KNO3 by mass. Describe how you would prepare the solution and what mass of each component you would use.

I understand how to find the amount of KNO3 in the solution (27.6 grams). But what is the second part of the question asking? Is it asking to find the mass of water?

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Re: G7

Postby JohannaPerezH2F » Sun Oct 06, 2019 9:40 pm

Yes so afterwards what you would do is find the mass of water by subtracting 510g-27.8g= 482.2G H2O

and the way to describe it would be that you measure 482g H2O on a balance and then pour it in a beaker. Then you weigh 27.8g of KNO3 and mix it with water until it dissolves.

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Re: G7

Postby mayafam25 » Sun Oct 06, 2019 9:44 pm

From what I understood, if it is stated that it is an aqueous solution, you have to assume there is some amount of water you must solve for!

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