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G. 9

Postby megangeorge-1K » Fri Apr 06, 2018 10:23 am

hello everyone!
I was hoping that someone could possibly explain to me question G. 9

A chemist studying the properties of photographic emulsions needed to prepare 500.0 mL of 0179 m AgNO3 (aq). What mass of silver nitrate must be placed into a 500.0 mL volumetric flask, dissolved, and diluted to the mark with water?

Thank you so much!

Elizabeth Parker 1K
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Joined: Wed Nov 15, 2017 3:00 am

Re: G. 9

Postby Elizabeth Parker 1K » Fri Apr 06, 2018 11:19 am

Hi! So this question is a determining solute concentration, so you will start by using the equation M(initial)*V(initial) = M(final)*V(final). With the measurements that you are given, plug in the values and then use systems of equations to get the mass of silver nitrate.

Alma Carrera 3C
Posts: 33
Joined: Fri Apr 06, 2018 11:02 am

Re: G. 9  [ENDORSED]

Postby Alma Carrera 3C » Fri Apr 06, 2018 11:26 am

Actually for this question you multiply the molarity of AgNO3 which they want (.179 M) x the volume in liters ( .500 L) x the molar mass of AgNO3 (169.88g/mol) to get the mass in grams of AgNO3 needed.

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