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### Information Review

Have out a scratch piece of paper and a pencil

Write all three chemical equations for each

- A solution of potassium iodide reacts with a solution of copper(I) nitrate

2. Solutions of silver nitrate and sodium chloride react

Write all three chemical equations for each

- A solution of potassium iodide reacts with a solution of copper(I) nitrate
- Solutions of silver nitrate and sodium chloride react

Concept Review

What do the coefficients in a chemical reaction tell you?

Is 1 g of substance A equal to 1 g of substance B?

How would you convert from grams to moles?

The quantitative relationship between the products and reactants in a chemical equation.

It’s this simple

- Write a balanced chemical equation.
- Compare reactants to products, products to products, or reactants to reactants using conversions.

Remember your molar road map:

Grams ----------------- Moles

Practical Application

You have just purchased the Plateau McDonald’s franchise and are going to make Big Macs. You check the storeroom and see that you have a large surplus of special sauce, lettuce, pickles, and onions. However you have a limited amount of hamburger patties, cheese slices, and buns.

Your Stockroom

You inventory your supplies and total 500 hamburger patties, 600 slices of cheese, and 650 hamburger buns.

Problem 1

If each Big Mac has 2 hamburger (Ha) patties, three buns (Bu). And 2 slices of cheese (Ch), write a balanced equation for the formation of a Big Mac from these ingredients using the symbols (Ha, Bu, Ch).

2Ha + 3Bu + 2Ch 1 Ha2 Bu3 Ch2

Problem 2

How many Big Macs can you make with the above ingredients?

Let’s try this using chemicals

Problem 1: Write the balanced chemical reaction of a solution of potassium iodide and a solution of lead (II)nitrate.

Problem 2

How many moles of PbI2 will be produced from 3.2 moles of KI and 4.5 moles of Pb(NO3)2?

One Step Further

If 5.06 g of KI and an excess of Pb(NO3)2 were reacted, how many moles of PbI2 would be produced?

Back to the Big Macs

Problem 3: Which is your limiting factor? In other words, which ingredient will run out first?

Problem 4

How much of each ingredient will be left over?

Recall the chemicals?

Problem 1: Write the balanced chemical reaction of a solution of potassium iodide and lead nitrate.

Problem 2: How many moles of PbI2 will be produced from 3.2 moles of KI and 4.5 moles of Pb(NO3)2?

Using our chemicals:

Problem 3: Which reactant limits how much of the products are produced?

Problem 4

How much of the other reactant is left over?

Problem 5

If 5.06 g of KI is completely reacted, how many grams of Pb(NO3)2 were reacted?

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