Question

Write down the concentration of each of the following solutions in g/L and mol/

2g NaOH in 50ml solution
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Answer 1

Explanation:

2 g NaOH in 50 mL solution :

Concentration of NaOH in g L

−1

=

Volume of NaOH in litre

Mass of NaOH in gram

=

50

2×1000

=40 gL

−1

In terms of gram per litre :

2 g of NaOH in 50 mL has concentration = 40gL

−1

Molecular mass of NaOH = 23 + 16 + 1 = 40

Molarity=

Volume of NaOH in L

Mass of solute in moles

=

40×50

2×1000

=1mol L

−1

In terms of moles per litre:

2 g of NaOH in 50 mL has concentration = 1mol L

−1

Answer 2

Answer:

Molarity = 1 g/L

......