slippedsumo
18.01.2022 •
Chemistry
Calculate the normality of a solution containing 0.5g of NaOH dissolved in 250cm3
. 1
(eq.mass of NaOH = 40)
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Ответ:
M = 0.47
Explanation:
1 - Turn grams to moles using molar mass:
16g NaOH × 1 mol NaOH / 40g NaOH = 0.4 mol NaOH
2- Turn milliliters to liters:
855mL × 1 L / 1000mL = 0.86 L
3- Use formula which is M = moles of solute / liters of solvent:
M = 0.4 mol NaOH / 0.86 L = 0.47