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Describe how to prepare 500.mL of 4.0M NaOH(aq). Show any calculations.?
Could someone help me with this question please?
3 Answers
- Dr.ALv 71 decade agoFavorite Answer
Moles NaOH needed = 0.500 L x 4.0 M =2.0
mass NaOH = 2.0 mol x 40 g/mol= 80 g
80 g of NaOH + enought water to reach the volume of 500 mL
- 1 decade ago
Volume = 500mL
Molarity = 4.0M
Molar mass of NaOH = 23+16+1 = 40g/mol
Molarity = (mass of NaOH * 1000) / (molar mass of NaOH * Volume)
Put Values,
4 = (mass of NaOH * 1000) / (40 * 500)
Mass of NaOH = (4 * 40 * 500) / 1000
Mass of NaOH = 16g
Dissolve 16 grams of NaOH, in water, in a beaker or volumetric flask and then make total voume of 500mL.
