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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: koolflair on October 14, 2009, 04:30:06 PM

Title: Gravimetric Analysis of Scrap Silver
Post by: koolflair on October 14, 2009, 04:30:06 PM

I was wondering if anyone can help me figure out how to find the mass percent of silver in my silver chloride sample. I have all the calculations but can't figure out how to use them.

The mass of my scrap silver totaled 24.463g

The filter paper x 2 was .926

and the two measurements from each filter paper were 1.4893g and .9319g

I don't know which has silver and which has chloride. I imagine the heavier one has silver, but I am just really confused on what percent silver is in my sample.

Can anyone help? I have a report due on this tomarrow, but can't figure out where to start. Thanks!

Title: Re: Gravimetric Analysis of Scrap Silver
Post by: koolflair on October 14, 2009, 05:22:15 PM

Okay so i searched the internet and found a good source.  So if i take 1.4893 - .9319 = .5574

Then take .5574X107.87/143.35 and get 41.9% silver.  Do you think that would be correct?

Title: Re: Gravimetric Analysis of Scrap Silver
Post by: typhoon2028 on October 14, 2009, 05:32:32 PM

I don't understand what you are asking.

"The mass of my scrap silver totaled 24.463g"  Is this pure silver or silver chloride?

"The filter paper x 2 was .926"  Is this the dry weight of 2 filter papers before use?

"and the two measurements from each filter paper were 1.4893g and .9319g"  Is this after two filtrations or two different runs?

Please explain your experiment, then we can help.

Silver chloride is approximately 75% silver by weight.