Chemistry Final Exam: 89 Multiple Choice questions (100%)
Key Concepts
1. Know how to balance chemical equation 2. Know your diatomics
3. Know that a catalyst is written over an arrow in a chemical equation 4. Know how to classify the five main types of reactions
5. Know what triangle means in a chemical equation. 6. Identify reactants and products are in a chemical equation
7. Know what Avogadro’s constant is 8. Know how to do stoichiometry problems
9. Know difference between homogenous and heterogeneous mixture 10. Know definition of an electrolytes with examples
11. Know the factors that affect the rate of reaction 12. Know saturated, unsaturated and supersaturated solutions
13. Know how to find molarity and molality problems 14. Know characteristics of acids and bases
15. Know the difference between oxy and binary acids 16. Be able to label acid/base, conjugate acid base pair
17. Know what amphoteric means 18.Know how to write a neutralization reaction
19. Know how to read the ph scale 20. Know how to do ph and poh problems
21. Know how to use M1V1=M2V2
22. Know how to read the solubility curve
23. Know to predict products for all the types of reactions
24. Know how to write formulas
Chemistry Review Questions for Final Exam
1) Balance the following equations and classify them as synthesis, decomposition, combustion, single replacement or double replacement reactions.
a) Fe2O3 + NaCl à Na2O + FeCl3
b) C7H6O2 + O2 à CO2+ H2O
c) KClO3 à KCl + O2
d) N2 + H2 à NH3
2) List the seven diatomics
3) Classify the following as a solid, liquid, gas or aqueous
a. CO2 b. O2 c. NaCl dissolved in water d.Na e. Br2
4) Convert the following to grams
a. 5.22 mol of Na b. 6.11 moles of Fe c. 1.201 moles of Ca d. 0.765moles of Au
5) a. Convert the following to grams of H2 if there are 3.22moles of N2
N2+ 3 H2 à 2NH3
b. Honors only: Copper reacts with sulfur and produces copper (I) sulfide. Write the balanced chemical equation
6) Classify as homogenous mixture or heterogeneous mixture
a. salt dissolved in water b. oil and water c. whole wheat bread
7) Differentiate between electrolyte and non electrolyte
b) Which of the following are electrolytes in solution? CO2 , NaCl, KBr
8) Which of the following does not help a solute to dissolve faster?
a. stirring b. surface area c. increase temperature d. decrease temperature
9) John wanted to make 1 cup of Kool-Aid. He read the instruction packet and it said for every 1 packet of Kool-Aid use 1 cup of water. However John wanted to be miser so he decided to use half of a packet of Kool-Aid instead so that he could enjoy his drink with the delicious sandwich he got from “Angelo’s Pizza”. He measured out 1 cup of water and added half of a packet of Kool-Aid mix. Define saturated, unsaturated and supersaturated. Explain what kind of solution John formed.
10) Use the solubility curve (in your notes) to answer the following questions:
a) Find the amount of KCl that can be dissolved in 500 grams of water at 50 oC. ______
b) At 50 oC, 60 grams of this compound can be dissolved, which compound is this? ______
c) At 70 oC which salt is the most soluble in 100 grams of water? ______
d) Which salt shows the least change in? solubility from 100C to 70 oC? ______
e) How much NH3 can be dissolved? In 600 grams of water at 80 oC? ______
11) Find the molarity of the following a) 2.50 moles in 324.0liters b) 5.61g of O2 in 300.00mlc) 2.244g SO2 in 210 mL
12) Find the molality of the following a) .50 moles in 324.0kg b) 5.61g of O2 in 300kg
13) Label each of the following if it describes an acid or base or both:
a. taste sour b. tastes bitter c. H2O d. HCl e) turns litmus red f) turns litmus blue g) NaOH
14) Complete the following neutralization reaction: NaOH + HCl à
15) Classify the following as a binary or oxy acid or neither
a. HClaq b. NaOH c. NaCl d. O2 e. f. HBraq
16) Identify the following as either Bronsted- Lowry acids, bases. Conjugate acid, conjugate base-5pts each
a. HNO3 + H 2O ---> H 3O+ + NO3
b. H 2SO4 + OH ---> HSO4 + H 2O
c. H 2PO4 + OH <---> HPO4 + H 2O
17) Find the [OH] if the [H] is 0.0010. 2. Find the ph of a solution with a [H] of 3.4* 10 –2. 3. Find the pOH of a solution with a [OH] of 4.25 x 10 –4 M
18) Classify the following as an acid, base or neutral
a) ph = 10.55 b) ph = 7.00 c) ph = 13.00 d) ph = 1.00
23) Honors only: Predict the products
a). Lithium bromide + zinc à
b) Oxygen + calcium à
c) lithium phosphate + magnesium nitrate à