How many grams of NaOH(MW=40) are there in 500.0 mL of a 0.175 M NaOH solution?

Question

Can someone explain this to me.

These are the answers to choose from.
a) 2.19 x 10^-3
b) 114
c) 14.0
d) 3.50
e) 3.50 x 10^-3

Now can see why I am confused. Please someone explain this to me.

These are the answers to choose from.
a) 2.19 x 10^-3
b) 114
c) 14.0
d) 3.50
e) 3.50 x 10^-3

Now can you see why I am confused. Please someone explain this to me.

Answer 1

Remember, molarity is moles of chemical / Liters of solution. Your first step should be to look at your molarity...0.175M can be translated as 0.175 moles/ 1 L. Next convert your 500.0 mL into Liters (1 L = 1000 mL). Now, multiple your moles (0.175) by your volume (0.5000 L). This will give you your total moles. From there you just need to convert to grams (multiply moles by MW--40g/mol).

Answer 2

about 3.7 grams just doing it in my head. 1 liter (1000ml) of 1M NaOH would take 40 grams. Half a liter (500 ml) would take 20 grams. But the solution isn'y 1M it is approximately 1/6M (a little more actually) so divide the 20 by 6 and you get an approximate answer.

Answer 3

0.175 M = 0.175 mol/liter

Therefore...0.175mol/liter x 40 g/mol x 0.5 liter = 3.5 g NaOH

Answer 4

i use to be able to know how to do that, but not now

Answer 5

13.749