Can anyone help me with this chemistry work over Solutions..10 pts best answer!!!
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Can anyone help me with this chemistry work over Solutions..10 pts best answer!!!

[From: ] [author: ] [Date: 11-11-20] [Hit: ]
concentration of the NaOH solution?What is the total volume (mL)of the solution?What is the molarity (M)of the solution?&&& thanks in advance:)-What is the %(m/m? concentration of the NaOH solution?( 21.......
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?
( 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
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