To prepare 300.0 ml of 0.2 M NaCl how many grams of NaCl should be weighed out

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04-11-2016
Chemistry

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To prepare 300.0 ml of 0.2 M NaCl how many grams of NaCl should be weighed out

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Willchemistry Willchemistry · Answer 1 · 2016-11-05T20:36:47+01:00

Willchemistry Willchemistry

05-11-2016

molar mass NaCl = 58.44 g/mol

Volume = 300.0 mL / 1000 => 0.3 L

number of moles:

1 L ------------- 0.2 M
0.3 L ---------- moles ?

moles = 0.3 x 0.2 / 1 => 0.06 moles of NaCl

Mass of NaCl:

1 mole NaCl -------------- 58.44 g
0.06 moles NaCl --------- mass

mass = 0.06 x 58.44 => 3.5064 g of NaCl

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