Help on Stoichiometry

[Tonylu1595]

For the following reaction, suppose exactly 5.00 grams of each reactant is used. How many grams of each product will be produced?

 

KHCO₃ + HCl --> KCl + H₂0 + CO₂

 

How would I do this? I'm sure I haven't been taught this but then again, hard to say with the way I am in class....

 

Don't need the answers or calculations, just how would I do this.

 

Edit: Solved

 

You'll need molecular mass of everything eventually, so figure those out, and write them down on a scratch pad.

Divide 5.00 grams by each of the weights of KHCO3, and HCl.

Take whichever number of molecules is less. (as the remainder of the greater will just get left in the system, if you want bonus points you can figure out the weight left)

Multiply the molecular weights of each of the products by this lesser number.

 

Make sure you show all working. You will be graded far more on the process of figuring out the answer, than the answer itself.

 

[Vacsol]

molar mass

[Tonylu1595]

molar mass

I would assume that because a total of 10 grams were put in, I would calculate the the total molar mass for every product and distribute by proportions, but that just seems inefficient. 

[Unique Little Snowflake]

Break everything up, but keep them on the same side of the equation, find the LCM of all the subscripts and divide each amount back out.

[Decon]

I would assume that because a total of 10 grams were put in, I would calculate the the total molar mass for every product and distribute by proportions, but that just seems inefficient. 

since equation is already balanced, use molar mass of reactants to find moles of reactants, use those numbers to find out the moles of products (not necessarily same a reactants), use molar masses of products to find the masses of the products

 

[slightlyjaded]

You'll need molecular mass of everything eventually, so figure those out, and write them down on a scratch pad.

Divide 5.00 grams by each of the weights of KHCO3, and HCl.

Take whichever number of molecules is less. (as the remainder of the greater will just get left in the system, if you want bonus points you can figure out the weight left)

Multiply the molecular weights of each of the products by this lesser number.

 

Make sure you show all working. You will be graded far more on the process of figuring out the answer, than the answer itself.

[Tonylu1595]

Make sure you show all working. You will be graded far more on the process of figuring out the answer, than the answer itself.

Wow. You sound like the chem teacher.

[slightlyjaded]

Wow. You sound like the chem teacher.

lol, Did chem at uni about a decade and a half ago. Made my beer money tutoring.

[slightlyjaded]

Wow. You sound like the chem teacher.

oh yeah, he's left you a clue as to how accurate he wants it in the question as well. He only wants 3 significant figures.

[JewishBacon]

mol to mol ratio!