A solution is prepared by dissolving 21.5 g NaOH in 124.0 water. The solution has a density of 1.15 g/mL
What is the %(m/m? concentration of the NaOH solution?
C=____________________________________…
What is the total volume (mL) of the solution?
V=_________________________________mL
What is the molarity (M) of the solution?
molarity=__________________________M
&&& thanks in advance:)
What is the %(m/m? concentration of the NaOH solution?
C=____________________________________…
What is the total volume (mL) of the solution?
V=_________________________________mL
What is the molarity (M) of the solution?
molarity=__________________________M
&&& thanks in advance:)
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What is the %(m/m? concentration of the NaOH solution?
( 21.5 g NaOH ) / (145.5 total grams) times 100 = 17.3% NaOH
What is the total volume (mL) of the solution?
145.5 grams total ) / (1.15 grams / ml) = 126.52 ml
your answer, rounds off to 3 sig figs as:
127 ml
What is the molarity (M) of the solution?
use molar mass to find moles
21.5 g NaOH) ( 1 mole NaOH / 40.0 grams) = 0.5375 moles NaOH
find molarity:
(0.5375 moles NaOH) / (0.12652 Litres) = 4.25 Molar
( 21.5 g NaOH ) / (145.5 total grams) times 100 = 17.3% NaOH
What is the total volume (mL) of the solution?
145.5 grams total ) / (1.15 grams / ml) = 126.52 ml
your answer, rounds off to 3 sig figs as:
127 ml
What is the molarity (M) of the solution?
use molar mass to find moles
21.5 g NaOH) ( 1 mole NaOH / 40.0 grams) = 0.5375 moles NaOH
find molarity:
(0.5375 moles NaOH) / (0.12652 Litres) = 4.25 Molar