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of an investigation, students were asked to prepare a sodium hydroxide solution of a certain molarity. The students were given a
of procedures. Which procedure will result in 750 mL of 1.5 M NaOH solution?
issolving 1.13 g of NaOH in enough water to make up to 750 mL of solution
ssolving 45 g of NaOH in enough water to make up to 750 mL of solution
ssolving 40 g of NaOH in 1 L of water
solving 1.13 g of NaOH in 0.750 L of water

Sagot :

Eduard22sly

The correct procedure is:

Dissolving 45 g of NaOH in enough water to make up to 750 mL of solution

What is molarity?

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

How to determine the mole of NaOH

  • Volume = 750 mL = 750 / 1000 = 0.75 L
  • Molarity = 1.5 M
  • Mole of NaOH =?

Mole = Molarity x Volume

Mole of NaOH = 1.5 × 0.75

Mole of NaOH = 1.125 mole

How to determine the mass of NaOH

  • Mole of NaOH = 1.125 mole
  • Molar mass of NaOH = 40 g/mol
  • Mass of NaOH =?

Mass = mole × molar mass

Mass of NaOH = 1.125 × 40

Mass of NaOH = 45 g

Thus, to obtain 750 mL of 1.5 M NaOH solution, 45 g of NaOH will be dissolved in enough water to make up to 750 mL of solution

Learn more about molarity:

https://brainly.com/question/15370276

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