Question
Asked Nov 13, 2019
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13.43 Calculate the molarity of the following aqueous solutions:
(a) 0.540 g of Mg (NO3 ) 2 in 250.0 mL of solution, (b) 22.4 g of
FHIA PLiCIO4 3 H20 in 125 mL of solution, (c) 25.0 mL of 3.50 M
A HNO3 diluted to 0.250 L. s
n
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13.43 Calculate the molarity of the following aqueous solutions: (a) 0.540 g of Mg (NO3 ) 2 in 250.0 mL of solution, (b) 22.4 g of FHIA PLiCIO4 3 H20 in 125 mL of solution, (c) 25.0 mL of 3.50 M A HNO3 diluted to 0.250 L. s n

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Expert Answer

Step 1

a)

Calculation of moles of Mg(NO3)2:

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weight moles= M.W 0.540g = 3.648 x 10 moles 148g/moi

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Step 2

Calculation of molarity of Mg(NO3)2:

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3.648*10 moles moles molarity volume 0.25L 0.014M

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Step 3

Calculation of moles of LiClO4....

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weight moles= M.W 22.4g 160.4g/mol =0.139moles

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