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Find the molarity of a solution that is prepared by dissolving 12.0g of sodium hydroxide in 325mL of water. - write out formula - substitute into formula or set up cancellation - calculate molar mass if needed; write correct answer with units. 0.92M NaOH.

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Presentation Transcript
slide1

Find the molarity of a solution that is prepared by dissolving 12.0g of sodium hydroxide in 325mL of water.

- write out formula

- substitute into formula or set up cancellation

- calculate molar mass if needed; write correct answer with units

slide3

How many moles of calcium sulfate are in 425mL of 0.65M calcium sulfate solution?

-write out formula

-substitute into formula or set up cancellation

-calculate molar mass if needed; write correct answer with units

slide5

What volume of 0.40M lithium nitrate solution can be made using 2.0moles of lithium nitrate?

Green: write out formula

Black: substitute into formula or set up cancellation

Red: calculate molar mass if needed; write correct answer with units

slide7

What mass of lithium nitrate must be dissolved in 250mL of water to make a 0.80M solution?

Green: write out formula

Black: substitute into formula or set up cancellation

Red: calculate molar mass if needed; write correct answer with units

slide9

What volume of 0.80M solution is needed to prepare 425mL of a 0.65M solution?

What volume of water is also needed?

Green: write out formula

Black: substitute into formula or set up cancellation

Red: calculate molar mass if needed; write correct answer with units

slide10

345mL solution

425-345 = 80mL water

slide11

Find the molarity of a sodium hydroxide solution if enough water is added to 325mL of 0.90M solution to bring the volume to 625mL.

Green: write out formula

Black: substitute into formula or set up cancellation

Red: calculate molar mass if needed; write correct answer with units

slide13

Find the molarity of a sodium hydroxide solution after 250mL of water is added to 400mL of 2.2M sodium hydroxide.

Green: write out formula

Black: substitute into formula or set up cancellation

Red: calculate molar mass if needed; write correct answer with units

slide15

2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

A student places an iron wire in a solution of 1.3M sulfuric acid.

What volume of 1.3M sulfuric acid would be needed to react with 2.8g of iron?

Black: label given and unknown amounts of reactants/ products

Red: create the bridge to calculate the unknown

slide17

2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

A student places an iron wire in a solution of 1.3M sulfuric acid.

What mass of iron is needed to react with 45.0 ml of 1.3 sulfuric acid?

Black: label given and unknown amounts of reactants/ products

Red: create the bridge to calculate the unknown

slide19

Lithium is mixed with calcium carbonate.

-Write the reactants

-predict the products

-Identify reaction type

- Predict states of matter for each substance

slide21

Nickel (II) nitratereacts with Sodium phosphate.

-Write the reactants

-predict the products

-Identify reaction type

- Predict states of matter for each substance