Question

What is the molarity of 2.0 gram NaOH present in 800ml of solution?

Answer 1

Answer:

Explanation:

o, to get the number of moles of solute, use sodium hydroxide's molar mass, which tells you what the mass of one mole of sodium hydroxide is.

7

g

⋅

1 mole NaOH

40.0

g

=

0.175 moles NaOH

The volume of the solution in liters will be

500

mL

⋅

1 L

1000

mL

=

0.5 L

Therefore, the molarity of the solution will be

c

=

n

V

c

=

0.175 moles

0.5 L

=

0.35 M

 

Rounded to one sig fig, the answer will be

c

=

0.4 M

Answer 2

Answer:

0.06 M



Explanation:

Molarity (M) =