# Chemistry Stuff...

• July 25th 2007, 05:13 AM
Chemistry Stuff...
I don't know whether chem. stuff is for this forum, but it is urgent.

I need the answers for the following questions to check mine against (don't bother to include solutions).

4. Commercial sulphuric acid contains 98.0% H2SO4 by mass and has a density of 1.84g mL-1. Calculate the concentration in mol L-1 of the solution.

6. 150mL of a 1.01 Mol L-1 KCl solution had 11.7g of NaCl dissolved in it. Calculate the new concentration in mol L-1 of the chloride ion. Assume no volume change.
And i did post this in the highschool mat help, but it has since become urgent...
• July 25th 2007, 06:05 AM
topsquark
Quote:

I don't know whether chem. stuff is for this forum, but it is urgent.

I need the answers for the following questions to check mine against (don't bother to include solutions).

4. Commercial sulphuric acid contains 98.0% H2SO4 by mass and has a density of 1.84g mL-1. Calculate the concentration in mol L-1 of the solution.

(snort) If I get it right...
I get 8.4 M $H_2SO_4$

Quote:

6. 150mL of a 1.01 Mol L-1 KCl solution had 11.7g of NaCl dissolved in it. Calculate the new concentration in mol L-1 of the chloride ion. Assume no volume change.
And i did post this in the highschool mat help, but it has since become urgent...

I really really hope this isn't a double post...
I get 3.21 mol Cl/L

-Dan