A #24.5*g# mass of sulfuric acid is dissolved in enough water to make a solution of #100*mL# volume. What is the concentration with respect to #H_2SO_4#?

1 Answer
Oct 27, 2016

Answer:

#"Molarity"# #=# #"Moles of Solute"/"Volume of solution"#

Explanation:

#"Moles of sulfuric acid"# #=# #(24.5*g)/(98.08*g*mol^-1)#

#"Concentration of sulfuric acid"#

#=# #(24.5*g)/(98.08*g*mol^-1)xx1/(100*cm^3xx10^-3*L*cm^-3)#

#=# #??mol*L^-1#.

Note that this answer is dimensionally consistent. We require an answer with units of concentration, and we got one! This is why scientists place so much emphasis on units; it helps to get the calculations right.

What is the concentration with respect to #H_3O^+#?