Calculate the molarity of solution given the following information: 10 g of NaOH dissolved in 500 mL of solution.

0.03 M
0.1 M
0.5 M
10 M

Question

Calculate the molarity of solution given the following information: 10 g of NaOH dissolved in 500 mL of solution.

0.03 M
0.1 M
0.5 M
10 M

anonymous · Answer

as i can remember molarity=nbr. of moles /volume
find the number of moles by dividing 10 by the molar mass of NaOH

anonymous · Answer

Thank you. Could you perhaps form the equation I need to work out with the given values? The terminology is messing me up a little.

anonymous · Answer

i don't know the molar mass of NaOH look it up in the periodic table i think it is 40g/mole but not sure,it must be given in the question

anonymous · Answer

So I just divide 10g by 40g? 40 is the molar mass.

anonymous · Answer

yes

anonymous · Answer

then divide the answer by 0.5L

anonymous · Answer

10g/40g = .25g             .25g/0.5L = .5. Thank you!