= the reactant that limits the amount of the other reactants that can combine, and the amount of products formed in a chemical reaction. = the substances that is not used up completely in a reaction. Each reaction has a limiting reactant. It works the same way as in baking. Imagine if you were to go home and mix up a batch of cookie dough to make your favorite chocolate chip cookies and discover that your little brother has been eating the chocolate chips as after-school-snacks and there are not enough chips left to make the whole batch of dough into chocolate chip cookies. The amount of chocolate chips limits the number of chocolate chip cookies you can make You will have to decide what else you can put in the batter to make a different kind of cookie. In chemical reactions, one of the reactants will run out before the other, this is the because it controls how much product will be made. The reactant that is left over (like the left over cookie dough without chocolate chips is the . To determine which reactant is limiting and which is in excess you must do TWO stoichiometry problems. You will be given two pieces of information and you must use each one to determine the number of moles of product. You must solve for moles because it is the common denominator. The reactant that makes the least amount is the limiting reactant and the other is the excess reactant. Example: If 5.01g of calcium hydroxide react with 2.2g of potassium bromide , how many moles of calcium bromide will be formed? Identify the limiting and excess reactant. Step 1: Write the balanced chemical equation. Ca(OH)_(2)+2KBrsimeq 2KOH+CaBr_(2)

Question

= the reactant that limits the amount of the other reactants that can combine, and the amount of products formed in a chemical reaction. = the substances that is not used up completely in a reaction. Each reaction has a limiting reactant. It works the same way as in baking. Imagine if you were to go home and mix up a batch of cookie dough to make your favorite chocolate chip cookies and discover that your little brother has been eating the chocolate chips as after-school-snacks and there are not enough chips left to make the whole batch of dough into chocolate chip cookies. The amount of chocolate chips limits the number of chocolate chip cookies you can make You will have to decide what else you can put in the batter to make a different kind of cookie. In chemical reactions, one of the reactants will run out before the other, this is the because it controls how much product will be made. The reactant that is left over (like the left over cookie dough without chocolate chips is the . To determine which reactant is limiting and which is in excess you must do TWO stoichiometry problems. You will be given two pieces of information and you must use each one to determine the number of moles of product. You must solve for moles because it is the common denominator. The reactant that makes the least amount is the limiting reactant and the other is the excess reactant. Example: If 5.01g of calcium hydroxide react with 2.2g of potassium bromide , how many moles of calcium bromide will be formed? Identify the limiting and excess reactant. Step 1: Write the balanced chemical equation. Ca(OH)_(2)+2KBrsimeq 2KOH+CaBr_(2)

Answer 1

1. Limiting reactant 2. Excess reactant

Answer 2

This question is asking for the identification of the limiting reactant and the excess reactant in a chemical reaction. The limiting reactant is the reactant that is completely consumed in a reaction and determines the maximum amount of product that can be formed. The excess reactant is the reactant that is not completely consumed in a reaction. In the given example, calcium hydroxide (Ca(OH)2) and potassium bromide (KBr) are the reactants. The balanced chemical equation shows that one mole of calcium hydroxide reacts with two moles of potassium bromide to produce two moles of potassium hydroxide and one mole of calcium bromide. Therefore, by comparing the amounts of the reactants, we can determine which is the limiting reactant and which is the excess reactant.

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