My chemistry is bad. I know these are very easy but I cannot solve them .
1. a) Prepare 200 ml of 2 M HCl solution from stock bottle containing 37% w/w HCl and d = 1.2 (g/ml). MWHCl = 36.5 g
b) Calculate M of 37% w/w HCl solution? d= 1.2, then solve the above problem
2. a) Prepare 200 ml of 2 M H2SO4 from 10 M H2SO4
b) Prepare 200 ml of 2 M H2SO4 from 10 N H2SO4
c) Prepare 100 ml of 1% glucose from 15 M glucose (MW= 180)
Solve 1b before 1a. Solve for molarity of the HCl solution. That's M = mols/L.
1.2 g/mL x 1000 mL x 0.37 x (1 mol/molar mass HCl) = M concentrated solution.
1a. Then use the dilution formula of mL1 x M1 = mL2 x M2
200 mL x 2 M = mL2 x Mfrom 1b.
Solve for mL to take of the stock solution to make 200 mL of 2M solution.
2a. Use the dilution formula.
2b. Same as 2a BUT change 10N H2SO4 to M first. 10N = 5M
2c. Use same dilution formula.
Thank you!
I understand all except 2c.
I did this way, is it true?
M1V1= M2V2
M1= 15 M
V1= ?
M2= 1/100ml= 10/1000ml = 10 M
V2= 100 ml
And so I find V1= 67 ml .