Calculate the number of grams of NaOH needed to prepare 2.00 L of 2.00 M NaOH?

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Answer 1 · 2018-04-18T04:54:41

#"160 g"#

Molarity is given by

#"Molarity" = "Moles of solute"/"Volume of solution (in litres)"#

#"2.00 M" = "n"/"2.00 L"#

#"n = 4.00 mol"#

Molar mass of #"NaOH"# is #"40 g/mol"#

So, mass of #"NaOH"# needed is

#4.00 cancel"mol" × 40\ "g"/cancel"mol" = "160 g"#