## general questions

connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am

### general questions

what's the purpose of finding the limiting reactant in a problem? When you find it, what's the next step you would do?

Jasmine Summers 4G
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

### Re: general questions

Finding the limiting reactant tells you what the maximum theoretical yield will be because you can only produce as much product as you have reactants to form that product. The limiting reactant is the reagent that is completely used up in the reaction, so it will indicate how much total product can form.

Reagan Smith 1H
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

### Re: general questions

Finding the limiting reactant allows you to find out how much product you will be able to make because the limiting reactant will run out the fastest, determining how much product is made. The next step would generally to find out how much of the product can be produced based on how much of the limiting reactant you have.

LBacker_2E
Posts: 104
Joined: Wed Sep 18, 2019 12:21 am
Been upvoted: 1 time

### Re: general questions

Finding a limiting reactant allows you to calculate the amount of product that is going to be produced. Thus the next step in a limiting reactant problem is often to find the amount of a certain product produced, but it may also be to find the amount of excess reactant that is left over after the reaction is completed. However, this will be explicitly asked if you are expected to do one of these calculations.

anjali41
Posts: 109
Joined: Fri Aug 09, 2019 12:15 am

### Re: general questions

The purpose of finding a limiting reactant or limiting reagent is to determine how much of the product you can make. Additionally, you can also calculate what mass of other reactants you need to fully react with the limiting reagent. The next step is to calculate how much product is made typically, or whatever the problem asks for.

Avnita C_4B
Posts: 50
Joined: Sat Sep 14, 2019 12:17 am

### Re: general questions

Out of the reactants given, finding the limiting reactant helps to find the accurate amount of moles for the products and which reactant is in excess. Using the reactant with is limited, the moles can be calculated and give out the moles of the products as well as the amount of the other reactants which is in excess.

Suraj Doshi 2G
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

### Re: general questions

The limiting reactant will tell you how much of the final product will be able to form. It also tells you what reactant is in excess (if there is excess).

Pipiena Malafu 3J
Posts: 39
Joined: Fri Sep 28, 2018 12:27 am

### Re: general questions

I think of finding the limiting reactant as tryna make a sandwich. If you're making a peanut butter and jelly sandwich, you will need two slices of breads and one jelly jar, and one peanut butter jar. If one ingredient is limited, like a slice of bread is gone (out of 4) then you're limited to 1 sandwich regardless of the other ingredients you have in excess.

Justin Sarquiz 2F
Posts: 106
Joined: Fri Aug 30, 2019 12:15 am

### Re: general questions

Everyone is correct about saying how the limiting reactant determines the amount of product formed. We can calculate the theoretical amount of product formed from our limiting reactant. Some problems would also give us the actual amount of product produced from the experiment, which would be the actual value. We can then calculate the percent yield by the formula % yield= actual/theoretical x 100%. Therefore, limiting reactants are important in percentage yield problems too.

Posts: 72
Joined: Wed Sep 18, 2019 12:18 am

### Re: general questions

The reason as to why we need to identify the limiting reactant is because in order for us to solve how much of a final product can be formed, we need to know how many grams of it's constituents are available, especially if one to them will limit how much can be formed in the first place. Depending on the context of the problem, usually after you find out what the limiting reactant is, you can use it to find the theoretical yield of a chemical reaction. You do this by multiplying the moles of the limiting reactant by a conversion factor that will convert moles of the limiting reactant to moles of the product.

Ethan Low 1L
Posts: 24
Joined: Wed Sep 18, 2019 12:15 am

### Re: general questions

We need to find the limiting reagent after balancing the equation according to their stoichiometric ratios. Finding the limiting reagent is important because this will be the deciding factor pertaining to how much the of the reagents actually react, normally amongst the reagents one of them will be limiting and the other will be in excess. The reaction only works up until the limiting reagent is completely used up, so with this we can find the amount of product actually produced using the stoichiometric ratios of the limiting reagent to product!

Shimei_2F
Posts: 100
Joined: Fri Aug 09, 2019 12:17 am

### Re: general questions

Finding the limiting reactant helps to determine the amount of a product that can be produced or how much of a reactant will react with the limiting reactant.