[springgy]

.

[Borek]

Mass to moles? What about using molar mass?

[AlIXe]

n is the number of moles

use moles = mass(g) / Relative mass SiF4

[springgy]

OMG, what an idiot i am. Probably one of the easiest questions ever, haha. 

Thanks Guys, would have replied after those were posted but my internet didn't seem to like this forum after a while =/

--------------------------------------------------

New question about neutralising.

I've been told to work the volume needed to neutralise 100cm³ of my aspirin solution (0.011M, and 2.05pH) with calcium hydroxide.

Now so far I worked out the Molarity of my calcium hydroxide, which I got 0.125M, but when I did the pH of it I got something like 0.9. Now, don't you need a acid and a alkali to neutralise?

So I'm a bit clueless as to either what to do, or where I have gone wrong. I've looked through my books from A-level, but I can't find anything on this and google just throws about 1bzillion pages at me.