Chemical Reactions Quiz

Last updated about 7 years ago

5 questions

1

What characteristics do endthermic reactions have? (select all that apply)

Aborb heat

Temperature increases

Release heat

Temperature decreases

Absorb heat

Temperature increases

Releases heat

Temperature decreases

Cooking an egg

Melting ice cubes

Wood burning

Explosive dynamite

Baking soda and vinegar reacting

Hand warmers

Wood burning

Photosynthesis

 ____ Pb(OH)2 + __2__ HCl → __2__ H2O + ____ PbCl2 

 ____ Pb(OH)2 + __3__ HCl → __2_ H2O + _1___ PbCl2 

 _2__ Pb(OH)2 + ____ HCl → __2__ H2O + ____ PbCl2 

It's alread balanced

What characteristics do endthermic reactions have? (select all that apply)

Aborb heat

Temperature increases

Release heat

Temperature decreases

What characteristics do exothermic reactions have? (select all that apply)

Absorb heat

Temperature increases

Releases heat

Temperature decreases

Select two examples of endothermic reactions.

Cooking an egg

Melting ice cubes

Wood burning

Explosive dynamite

Select two examples of exothermic reactions.

Baking soda and vinegar reacting

Hand warmers

Wood burning

Photosynthesis

 Balance the following equation.  Use a separate sheet of paper to show your work.
____ Pb(OH)2 + ____ HCl → ____ H2O + ____ PbCl2

 ____ Pb(OH)2 + __2__ HCl → __2__ H2O + ____ PbCl2 

 ____ Pb(OH)2 + __3__ HCl → __2_ H2O + _1___ PbCl2 

 _2__ Pb(OH)2 + ____ HCl → __2__ H2O + ____ PbCl2 

It's alread balanced