Note: When you show NO EFFORT I usually don't work these. Surely you know SOMETHING about this. Surely the equation.
sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas.
write a balanced chemical equation for this reaction?
2Na + H2 ==> 2NaH
what is your limiting reactant?
mols Na = grams/atomic mass Na = ?
mols H2 = grams/molar mass = ?
Using the coefficients in the balanced equation, convert mols Na to mols NaH product.
Do the same and convert mols H2 to mols NaH product.
The limiting reagent (LR) is the reagent (Na or H2) that produces the smaller number of mols of the product.
what is your theoretical yield (in grams)?
Take the smaller number of mols x molar mass NaH to find the grams of NaH produced. This is the theoretical yield (TY).
how many grams of excess reactant are left over at the end of the reaction?
Using the coefficients in the balanced equation, convert mols LR to mols excess reagent (ER) USED, that times atomic or molar mass to get grams. Then subtract from the grams initially to find how much is left over.
if 4.28 g of NaH were recovered at the end of the reaction, what is the percent yield of the reaction?
The actual yield (AY) is 4.28 grams.
%yield = (AY/TY)*100 = ?
Post your work if you have trouble.
sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas.
write a balanced chemical equation for this reaction?
what is your limiting reactant?
what is your theoretical yield (in grams)?
how many grams of excess reactant are left over at the end of the reaction?
if 4.28 g of NaH were recovered at the end of the reaction, what is the percent yield of the reaction?
3 answers
PLEASE HELP
sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas.
2Na + H2 ==> 2NaH
what is the limiting reactant?
what is the theoretical yield (in grams)?
sodium metal reacts with hydrogen gas to yield solid sodium hydride ( NaH ). A reaction mixture contains 10.00 g sodium metal and 0.235 g of hydrogen gas.
2Na + H2 ==> 2NaH
what is the limiting reactant?
what is the theoretical yield (in grams)?
I gave you a DETAILED procedure for working this problem in toto. Step by step, explain, in detail, what you don't understand. As far as I can tell you've just rewritten the problem.
1 answer