- #1
QuarkCharmer
- 1,051
- 3
Homework Statement
A 10.000g sample of toothpaste containing stannous fluoride gives a 0.145g precipitate of stannous phosphate. What is the percentage of SnF_2 in the toothpaste sample?
Homework Equations
[tex](Actual yield)/(Theoretical yield) * 100%[/tex]
[tex]3SnF_{2}_{(aq)} + 2K_{3}PO_{4}_{(aq)} \rightarrow Sn(PO_{4})_{2}_{(s)} + 6KF_{(aq)}[/tex]
The Attempt at a Solution
I am not positive what they are asking here. I understand that they want me to use the above formula (the percent one) to find the % composition of a certain molecule in the substance. I am thinking that they want me to first use the 10.000g to calculate the theoretical yield of the stannous fluoride using basic stoichometry and then divide the given mass of product (the precipitate) by that to get a number as a percent. Is that the correct approach?
Thanks
Edit, something is up with the LaTeX here, there should be a formula for calculating the percent (X/Y *100%) and the chemical equation, i don't know why it's rendering like it is with 2 of the chemical formulas. If you click the top equation you will see what I mean.