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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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47. What mass of NaOH pellets is required to prepare 3.5 L of

0.50 M NaOH solution?

Interpretation Introduction

Interpretation:

The mass of NaOH pellets required to prepare a solution is to be calculated.

Concept Introduction:

The atomic mass of an element is defined as the sum of number of protons and number of neutrons. Molar mass of an element is determined from atomic mass of an element.

The number of moles is calculated by the formula,

Moles=MassgMolarmass

Molarity is used to find out the concentration of solution.

The molarity is calculated by the formula,

Molarity=NumberofmolesofsoluteVolumeofsolution.

Explanation

The volume and molarity of NaOH solution is given to be 3.5L and 0.50M respectively.

The molar mass of NaOH is,

Molarmass=AtomicmassofNa+AtomicmassofH+AtomicmassofO=23+1+16g/mol=40g/mol

The number of moles of solute is calculated by the formula,

Numberofmolesofsolute=Molarity×Volumeofsolution

Substitute the values of number of moles of solute and volume of solution in the above expression

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