[britbro19]

For percentage we always did g of what we wanted divided by g of the sample times 100%

[Borek]

You want mass of chlorides - solve for that.

[britbro19]

1.2 g of sample is 440.25% chlorine.

1.2 x .4025 = .483 g of chlorine in the sample

.483 g Cl x 1 mol Cl
               35.452 g Cl  = .013624 mol Cl

[Borek]

OK, now moles af AgCl, mass of AgCl and you are ready.

[britbro19]

but I thought the problem already gave the mass of AgCl?

[Borek]

Practical, you need a theoretical one as well to calculate percent yield.

[britbro19]

So,

100-40.25 Cl=59.75% Ag

1.2 x .5975=.717 g AgCl

.717 g AgCl x 1 mol AgCl
                  143.32 g AgCl =.005003 mol AgCl

[Borek]

No. Take a look at the reaction equation. How many moles of AgCl produced for one mole of Cl? How many moles of Cl (hint: don't calculate it again, you already did it just a moment ago).

[britbro19]

Ag+  + Cl- ----> AgCl

Therefore it's a 1:1 ration, so there's the same number of moles of Ag and Cl? Ok. Now what?

[Borek]

Now you reread the whole thread and do what I told you several times earlier. Sorry, but it is up to you to solve the question, not up to me to spoonfeed you for hours.

[britbro19]

Yes, I know that. Thank-you for being so rude. But as I've told you before, we've never done this before because we've missed so much school due to hurricanes and chemistry is not the sort of subject that just clicks.

[JGK]

Yes, I know that. Thank-you for being so rude. But as I've told you before, we've never done this before because we've missed so much school due to hurricanes and chemistry is not the sort of subject that just clicks.

Funny that the local time in your profile puts your location as somewhere in the Mid-Pacific (at GMT-11.0). Unless I'm mistaken Hurricanes Gustav and Ike never got within 4 time zones of you.

[Borek]

Funny that the local time in your profile puts your location as somewhere in the Mid-Pacific (at GMT-11.0). Unless I'm mistaken Hurricanes Gustav and Ike never got within 4 time zones of you.

That's default time zone of everyone that has not fully configured its account. IP puts britbro19 in New Orleans.

Interestingly, same IP was used over a year ago by user BRIT, asking for a... theoretical yield.

http://www.chemicalforums.com/index.php?topic=17049

What a coincidence.