Chapter 10 Rates of chemical reactions

Four light sticks are placed in water baths of varying temperatures. At which temperature would the light stick glow the brightest?

• 0° C

• 20° C

• 30° C

• 40° C

A substance that slows down or stops a chemical reaction is called a(n)______________.

• concentrate

• catalyst

• inhibitor

• product

In which type of reaction do ions in two compounds switch places?

• synthesis

• decomposition

• single replacement

• double replacement

The equation is an example of which type of chemical reaction? NaCl + AgF -->NaF + AgCl

• synthesis

• decomposition

• single replacement

• double replacement

A chemical reaction in which energy is absorbed is ______________.

• an endothermic reaction

• an exothermic reaction

• a single replacement reaction

• a double replacement reaction

This equation is an example of which type of chemical reaction? Zn + 2HCl--> ZnCl2 + H2

• synthesis

• decomposition

• single replacement

• double replacement

Which of the following chemical reactions illustrates a decomposition reaction?

• 4H2 + 2O2 --> 2H2O

• 2H2O --> 2H2 + O2

• 6CO2 + 6H2O --> C6H12O6 + 6O2

• 4KI + 2Cl2 --> 4KCl + 2I2

Which phrase describes what happens to atoms in a chemical reaction?

• never lost or gained, just rearranged

• sometimes lost, never rearranged

• sometimes lost, gained, or rearranged

• lost or gained, never rearranged

Which phrase describes what happens to atoms in a chemical reaction?

• never lost or gained, just rearranged

• sometimes lost, never rearranged

• sometimes lost, gained, or rearranged

• lost or gained, never rearranged

Which of the following chemical equations is balanced?

• Ca + 2O2 --> 2CaO2

• 3Ca + O2 --> 3CaO2

• 3Ca + 2O2 --> 5CaO2

• Ca + O2 --> CaO2