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UK / Chemistry / CHEM 105 / What is the definition of chemical reaction?

What is the definition of chemical reaction?

What is the definition of chemical reaction?

Description

Exam 2 Study Guide

Terms to know

Chemical reaction

Chemical formula

Chemical equation

Electrolyte

Nonelectrolyte

Dissociation

Ionization

Reversible reaction

Solvable

Insolvable

Oxidation number

Limiting reactant

Excess reactants

Titration

Titrant

Thermochemistry

Exothermic reactions

Endothermic reactions

Kinetic energy

Thermal energy

Potential energy

System

Surroundings

Joule

Calorie

Internal energy

State function

Path function

Heat / heat flow

Temperature

Precipitation reactions

Precipitate

Ionic equation

Spectator ions

Net ionic equation

Acids

Bases

Neutralization reactions

Redox reactions

Reducing agent

Oxidizing agent

Theoretical yield

Actual yield

Equivalent point

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Thermal equilibrium

Heat capacity

Specific heat capacity

Molar heat capacity

Calorimetry

Enthalpy / enthalpy change

Standard enthalpy of formation

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Practice Questions

  1. How many grams are in 5.5o mole of propane C3H8?
  1. 71.5
  2. 243
  3. 13
  4. 48.6

  1. Caffeine has a percent by mass of 49.48% C, 5.19%H, 16.47%D, and 28.86%N. What is the empirical formula of caffeine?
  1. C4H5OH2
  2. C3H2O3N2
  3. C2H2O2N
  4. CHON
  1. If 10 grams of magnesium are added to a solution containing 100 mole of hydrochloric acid, how many grams of hydrogen gas are produced? Mg(s) + 2HCI(aq) → H2(g) + MgCL2(aq)
  1. 1.008g H2
  2. 0.829g H2
  3. 2.106g H2
  4. 0.551g H2
  1. FeS(s) + 2HCI(aq) → FeCI2(s)+H2S(g) What is the percent yield if D.223moles of FeS reacts with an excess of HCL to produce 7.00 grams of H2S?
  1. 77.3%
  2. 82.1%
  3. 92.1%
  4. 96.6%
  1. How many grams of NaOH (molar mass = 40g/mol)are in 600mL of a D.650 M NaOH solution?
  1. 15.6g
  2. 11.5g
  3. 20.9g
  4. 6.7g
  1. When the amount of an ideal gas in a sample increases at constant temperature are pressure, the sample volume _________ proportion to the number of moles of the gas
  1. Increase in inverse
  2. Decreases in inverse
  3. Has no effect on the
  4. Increases in direct
  1. Based on solubility rules, which compound should be soluble in water?
  1. (NH4)3PO4
  2. Ag3PO4
  3. ALPO4
  4. Ca3(PO4)2
  1. Which is a weak acid in an aqueous solution?
  1. Hydroiodic acid, HI
  2. Citric acid, C6H8O7
  3. Nitric acid, HNO3
  4. Perchloric acid, HCLO4
  1. If 91.0g of C2H2O4 and 79g of CH4O react to form 89g of C4H6O4, What is the percent yield?
  1. 89.16%
  2. 43.79%
  3. 74.98%
  4. 82.77%
  5. 74.56%
  1. How many moles of ethanol, CH3CH2OH, are contained in 5548mL of 0.0788M ethanol solution?
  1. 1.44 x 10-3mol
  2. 2.32 x 10-2mol
  3. 5.26 x 10-3mol
  4. 4.32 x 10-2mol
  1. What is the limiting reactant when 40g of magnesium reacts with 38g of molecular oxygen? 2Mg(s) + O2(g) → 2MgO(s)
  1. Both
  2. Neither
  3. Molecular oxygen
  4. Magnesium
  1. What volume of a 0.300M KCL solution will completely react with 2.00L of a 0.300 Pb(NO3) solution based on the balanced chemical equation? 2KCL(aq) + Pb(NO3)2(aq) → PbCL2(s) + 2KNO3(aq)
  1. 3.92L
  2. 5.33L
  3. 2.83L
  4. 4.76L

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