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Information Review

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Information Review

Have out a scratch piece of paper and a pencil

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

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

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?

Stoichiometry

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

- 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

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.

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

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

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

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

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

One problem with the mole:

We have no way of directly measuring moles

We can convert:

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

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

How much of each ingredient will be left over?

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?

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

How much of the other reactant is left over?

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