ok 4.1g of Cr is heated with 9.3g of Cl2 what mass CrCl3 will be produced. i got 12.3 when i converted 4.1g of Cr and 13.9 when i converted 9.3g of Cl2.....is that it or do i add them together?
2007-03-28 12:04:35 · 1 answers · asked by Kelsey S 1 in Science & Mathematics ➔ Engineering
ahhh i wondered about that so i will leave my answers seperate... thanks!!!
2007-03-28 12:11:11 · update #1
no actually the answer is the smaller one, 12.3 g. This is because the chromium is used up before all the Cl2 is used up, so you can't use the amount of the Cl2 to determine how much product is formed. The Cr is called the limiting reagent because it runs out first. You find the limiting reagent in problems like this by first converting each amount of products to moles and then comparing the MOLAR amounts. the smaller amount is the limiting reagent and you use that compound to figure out how much product is formed.
2007-03-28 12:08:12 · answer #1 · answered by dac2chari 3 · 0⤊ 0⤋