Chemistry performance final review

10.0 g of KCl are dissolved at 40°C. How many more grams should be added to make a saturated solution? Type in the answer as a number with two numbers to the right of the decimal, without units.

30.00

The study of quantitative relationships between the amounts of reactants used and products formed by a chemical reaction is called?

Stoichiometry

Identify the solute and solvent in an aqueous (water) solution of fructose (fruit sugar). solute:

fructose

Based on the graph above, cerium sulfate (Ce2(SO4)3) behaves like a substance that is in what phase/state of matter?

gas

Oxygen in the air is reacts with iron metal in a nail to produce iron (III) oxide (or what is known as rust). What is the limiting reactant?

iron

What are the two products in a neutralization reaction? ______________ and ______water_______

salt

The substance being dissolved in a solution is the ____________________.

solute

The substance doing the dissolving in a solution is the

solvent

Read the description below and decide if it best describes an acined, base, or neutral solution OR if it describes both an acid and base. Type in your choice as "acid", "base", "neutral" or "both. [H+] = [OH-]

neutral

Number 1 is "stays red",or "turns blue". Type in your choice.

turns blue

Number 2 is "no change, stays clear" or "turns pink". Type in your choice.

turns pink

75 grams of calcium chloride is added at 25°C. Is the solution unsaturated, saturated, or supersaturated?

unsaturated

Identify the solute and solvent in an aqueous (water) solution of fructose ( fruit sugar). Solvent: _______________

water

What are the two products in a neutralization reaction? ___salt_____ and ___________

water

How much heat has been absorbed by 7500 g of water when its temperature changes from 13.0 °C to 23.0 °C?

313,800 J

A 10 g sample of a material was heated from 15 °C to 35 °C, and was found to have absorbed 99 J of heat energy. What is the specific heat of this material? Final must have 4 numbers to the right of the decimal. Unit is "J/gC" (reference picture)

0.4950 J/gC

What is the molarity of a solution that contains 71.41 g of CuCl2 per 780.82 mL of solution. Use M for the units.

0.68 M

Use the balanced chemical equation to answer the following question. 1 CaBr2 + 1 Na2SO4 → 1 CaSO4 + 2 NaBr How many grams of calcium sulfate will be made from 8.54 moles of calcium bromide? Use g for the unit in your answer. The number part of the answer must have two numbers to the right of the decimal.

1,162.72 g

Use the balanced chemical equation to answer the following question. 1 CaBr2 + 1 Na2SO4 → 1 CaSO4 + 2 NaBr How many moles of sodium bromide can be made from 5.80 moles of calcium bromide? Use mol for the unit in the answer.

11.60 mol

What mass (in grams) of H2SO4 would be required to prepare 622.36 mL of a 0.21 M H2SO4 solution? For units use grams.

12.82 grams

Calculate the molar mass of aluminum phosphate AlPO4. Include two numbers to the right of the decimal place

121.95 G/MOL

Calculate the molar mass of ammonium sulfate,( NH4)2S04. Type in the answer as a number, with two numbers to the right of the decimal place.

132.17 g/mol

Use the balanced chemical equation to answer the following question. 1 CaBr2 + 1 Na2SO4 → 1 CaSO4 + 2 NaBr How many grams of calcium bromide will be needed to make 100.72 grams of calcium sulfate? Use g for the unit in your answer. The number part of the answer must have two numbers to the right of the decimal.

147.87 g

In section 1 of the graph, 75.00 g of ice are heated from -10.00ºC to the melting point of water. How much heat is absorbed in this section?

1523 J

Which section of the curve is where solidification takes place?

2

Calculate the percent composition of nitrogen in ammonium sulfate, (NH4)2SO4

22.20 % N

Calculate the percent composition of sulfur in ammonium sulfate (NH4)2SO4

24.27 % S

How many grams of potassium chloride can be dissolved in 68.0 g of water at 40°C ? _____ At 40°C 100.00 g of water will dissolve 40.00 g of potassium chloride KCl. Hint: The graph is based on 100 g water so you will need a ratio. The answer must have two numbers to the right of the decimal such as 10.00 or 20.00.

27.20

Using the nutrition label, how much energy (in calories) is provided by eating 5 cookies. Use dimensional analysis; look carefully at servings and cookies. Convert cookies to servings. 1 serving = 4 cookies. Convert Calories to calories. 1 Calorie = 1000 calories. Use "calories" for the unit in your answer. (reference picture on phone)

275,000 calories

How much heat has been absorbed by 1,196 g of water when its temperature changes from 23 °C to 93 °C? Use "Joules" for the units. The specific heat of water is 4.184 J/gC. Enter your answer as a whole number. (reference phone photo)

350,284 Joules

Calculate the percent composition of oxygen in ammonium sulfate (NH4)2SO4

48.42 % O

Calculate the percent composition of hydrogen in ammonium sulfate (NH4)2SO4

6.11 % H

Number 3 is "acid", "base" or "neutral". Type in your choice.

Acid

1 mole=

Molar mass

6.02 X 10^23= one _____________

Mole

The SI unit used to measure the amount is the

Mole

How would you calculate the amount of heat absorbed during one of the slanted sections of the curve?

Q= (m) (c) (delta T)

This is a balanced acid base neutralization reaction. HNO3 + NaOH---> NaNO3 + H2O

True

What is the name of the universal solvent? _________________

Water

Read the description below and decide if it best describes an acid, base, or neutral solution OR if it describes both an acid and base. Type in your choice as "acid", "base", "neutral" or "both. The solution corrodes magnesium. (reacts with a metal)

acid

Read the description below and decide if it best describes an acid, base, or neutral solution OR if it describes both an acid and base. Type in your choice as "acid", "base", "neutral" or "both. The solution reacts with sodium hydroxide

acid

What are the two reactants in a neutralization reaction? ________ and ____base_____

acid

Which region(s) on the graph above show an increase in potential energy?

b & d

In which region(s) on the graph above would liquid water be present?

b,c & d

Number 4 is "acid", "base" or "neutral". Type in your choice.

base

Read the description below and decide if it best describes an acid, base, or neutral solution OR if it describes both an acid and base. Type in your choice as "acid", "base", "neutral" or "both. A pH meter indicates that the pH of a solution is 8.1.

base

What are the two reactants in a neutralization reaction? ___acid______ and ____________

base

Read the description below and decide if it best describes an acid, base, or neutral solution OR if it describes both an acid and base. Type in your choice as "acid", "base", "neutral" or "both. The solution conducts electricity when tested with a conductivity apparatus.

both

Does this diagram represent an endothermic or exothermic reaction? Will the temperature of the surroundings increase or decrease?

endothermic, decrease

_____________ _________________ is the reactant that remains after a reaction stops

excess reactant

_________________ _______________ is a reactant that is totally consumed during a chemical reaction , limits the extent of the reaction, and determines the amount of product.

limiting reactant

How would you calculate the amount of heat absorbed during one of the flat sections of the curve?

mass (g) x mol/g x kJ/mol = kJ

Stoichiometry is based on the law of conservation of __________.

mass, law of conservation of mass

Number 5 is "acid", "base" or "neutral". Type in your choice.

neutral