Unit 1
Unit 2
Unit 3
Unit 4
Miscellaneous
100

Chemical or Physical?

  • A loaf of bread rots
  • Iron rusts in contact with air

Both are chemical

100

What type of compounds typically have high melting points and high conductivity?

ionic compounds

100

Balance the equation

Na +  H2O --->  NaOH +  H2    

2 Na + 2H2O --> 2NaOH + H2

100

Write the mol ratios between the reactants.

2NaOH + H2SO4 --> Na2SO4 + 2H2O

2 mol NaOH / 1 mol H2SO4

1 mol H2SO4 / 2 mol NaOH

100

Give the number of significant figures in the following:

0.010

6.50 x 10^23

6500

2

3

2

200

Chemical or physical?

  • You step on a piece of chalk, turning it into powder
  • Burning toast
  • Snow melts when the sun is out
  • Water freezing

chalk - Physical

toast - Chemical 

snow - Physical

water - Physical

200

Write the symbol for the element with 39 protons and 50 neutrons, and 36 electrons.

89/39 Y3+

200

Balance the reaction and name the reaction type:

Fe +  O2 --->  Fe2O3

4Fe +  3O2 --->  2Fe2O3

Synthesis

Redox

Combination

200

2NaOH + H2SO4 --> Na2SO4 + 2H2O

How many moles of water can be made if 2.5 moles of sodium hydroxide react with excess sulfuric acid?

2.5 moles of water

200

How many millimeters are in 5.4 kilometers?

5.4 x 10^6 mm

300

Chemical or physical?

  • Scrambling eggs
  • Baking a cake
  • Tearing paper

eggs - chemical

cake - chemical

paper - physical

300

Name the following:

  • Na2(CO3)
  • Pb(NO3)2            
  • P2O
  • N2O4

sodium carbonate

lead II nitrate

diphosphorus monoxide

dinitrogen tetroxide

300

Write the balanced equation and name the reaction type:

sodium hydroxide and sulfuric acid react to make sodium sulfate and water.


2NaOH + H2SO4 --> Na2SO4 + 2H2O

neutralization

double replacement

300

How many grams of water can be made if 3 moles of hydrogen react with excess oxygen?

2H2 + O2 --> 2H2O

54.06g water

300

Write and balance the reaction.

Lithium hydroxide reacts with hydrochloric acid to make two products.

LiOH + HCl --> LiCl + H2O

400

Give the number of protons, neutrons, and electrons for the following isotopes

14/6 C

3/1 H

C - 6 protons, 8 neutrons, 6 electrons

H - 1 proton, 2 neutrons, 1 electron

400

Write the formulas

  • sulfur trioxide
  • ammonium sulfate
  • Iron (II) Hydroxide

SO3

(NH4)2SO4

Fe(OH)2

400

Write the word equation:

Fe2S3 (s)  + HCl (g) --> FeCl3 (s)  + H2S (g)

solid iron III sulfide reacts with hydrochloric acid gas to make solid iron III chloride and dihydrogen sulfide (or hydrogen sulfide) gas.  

400

Zn + HCl --> ZnCl2 + H2

Calculate the mass of HCl needed to react completely with 50.0g of zinc.

55.8g of HCl

400

List the three needs (types of equivalence statements) in stoichiometry problems.

mol ratios

conversion from "given" to moles

conversion from "find" to moles

1 mol = molar mass

1 mol = 6.02^23 particles

1 mol = 22.4 L of a gas at STP

500

For the following symbols, give the number of protons, neutrons and electrons, AND name the family.

  • 120/51 Sb3+
  • 26/12 Mg2+
  • 80/35 Br -

Sb3+ 51 protons, 69 neutrons, 48 electrons

Mg2+ 12 protons, 14 neutrons, 10 electrons

Br- 35 protons, 45 neutrons, 36 electrons

500

Make the compounds and give the names:

  • Fe2+ and O2-
  • Ammonium ion and phosphate ion
  • Tin (IV) ion and sulfur ion
  • silver and carbonate

FeO

(NH4)3PO4

SnS2

Ag2CO3

500

Give the complete balanced equation and reaction type for methane (CH4) gas burning in oxygen gas (you must predict the products)

CH4(g) + 2O2 (g) --> CO2 (g) + 2H2O (g)

500

How many liters of oxygen will be made (at STP) if 100. grams of potassium chlorate react with 100. grams of potassium chloride? Name the limiting reactant.

KClO3 (s) --> KCl (s) + O2 (g)

potassium chloride is not a reactant.

potassium chlorate decomposes to make 27.33L of water. 

500

Balance the reaction and write the net ionic equation.

NaOH + H2SO4 --> Na2SO4 + H2O

2NaOH + H2SO4 --> Na2SO4 + 2H2O

OH-(aq) + H+(aq) --> H2O (l)

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