2006-11-29 05:35:20 · 3 answers · asked by jak 3 in Science & Mathematics ➔ Chemistry
Number of moles = mass/formula mass for a pure acid.
But acids in solution have a different equation:
moles = volume x molarity/1000
The volume in the above equation is in cm3.
2006-11-29 05:51:08 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
wow, could ya give us some more info - like what you have to start with?
if you are given the molarity and a volume, take the molarity (for example, 3 M (molar) or 5mM (milimolar)) and multiply it by the volume in the same units as the molarity (liters, or mL, for the two above). so if you have 3M solution, and 500 mL of it, you would have to first convert the volume to L - giving .500L - multiply them together and you get 1.50 moles.
if you are given grams of acid (yes acids can be solids) - multiply the molecular mass (atomic weight of each atom in the molecule added, i.e. water is about 18g/mole - 16 from O and 1 from each H) times the amout of acid given in grams, and you will get an answer in moles
2006-11-29 14:05:32 · answer #2 · answered by annie*bananie 2 · 0⤊ 0⤋
Man this was a long time ago.You need to work out the formula mass of the substances that make the acid and find the volume you have.1 mole is the equivalent of the formula mass eg HCl you would find the relative atomic mass of H and Cl.Get the volume and divide it by............................... im stuck please if anyone knows remind me!
2006-11-29 13:47:03 · answer #3 · answered by gavin c 1 · 0⤊ 0⤋