how many grams of sodium chloride are there in 2.5 L of a 0.4% w/v solution?. need to know how to figure this out
5 answers
I get one gram..but I thimk I am doing this wrong
0.4% w/v solution = .4 grams of sodium chloride per 100mL of solution
.4g/[(100/1000)L] = ?g/(2.5L)
I divided 100 by 1000 to get liters. Cross multiply and solve for the number of grams of sodium chloride.
This will give you a better sense of percentage by weight:
http://www.sciencecompany.com/lab/test_solns.htm
.4g/[(100/1000)L] = ?g/(2.5L)
I divided 100 by 1000 to get liters. Cross multiply and solve for the number of grams of sodium chloride.
This will give you a better sense of percentage by weight:
http://www.sciencecompany.com/lab/test_solns.htm
so I would set it up like
4g ?
---- -----
10L 2.5L
so i did 4 x 2.5 = 10 / 10 = 1 gr. is this right?
4g ?
---- -----
10L 2.5L
so i did 4 x 2.5 = 10 / 10 = 1 gr. is this right?
the numerator was supposed to be 0.4 g
the 10L denominator you computed is incorrect, 100/1000 = .1 L
Instead you'll have this when you cross multiply:
(0.4g)*(2.5L)=(?g)(.1 L)
the 10L denominator you computed is incorrect, 100/1000 = .1 L
Instead you'll have this when you cross multiply:
(0.4g)*(2.5L)=(?g)(.1 L)
Oh, so now I have 0.016 grams. I think I got it now..thanks :)