Chemistry, asked by felixaricelli75, 2 months ago

What is the molarity of a solution containing 50.00 g of H3PO4 dissolved in 500.0 ml of solution?

Answers

Answered by bm61299
1

Answer: The molecular weight of NaOH is 40 g/mol.

The number of moles of NaOH  

40 g/mol

5 g

=0.125 moles.

500 ml water corresponds to0.500 L.

The molarity of the solution =

0.500 L

0.125 moles

=0.25 M

Explanation: Calculate the number of moles of NaOH present in 750 ml of 0.4 m. solution. (Molecular weight of NaOH is 40):

Q2

8g of NaOH is dissolved in 18g of H

2

O. Mole fraction of NaOH in solution and molality (in mol kg

−1

) of the solutions respectively are:

Q3

Calculate the molarity of a solution containing 5g of NaOH dissolved in the product of a H

2

−O

2

 fuel cell operated at 1A current for 595.1 hours.

(Assume 1F=96500 C/mol of electrons and molecular weight of NaOH as 40g mol

−1

)

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