Unit 6 - Chemical Reactions

Question 1

Synthesis

Answer 1

A compound is made from simpler materials (A+B –> C)

Question 2

Decomposition

Answer 2

A compound is broken down to simple compounds, or to elements that make it up (C–> A+B)

Question 3

Single Replacement

Answer 3

One element that starts out by itself, replaces another element in a compound, kicking it out (A+BC –> B+AC)

Question 4

Double Replacement

Answer 4

The positive and negative ions in two compound switch places (AB+CD –> AD+CB)

Question 5

Combustion

Answer 5

A compound containing carbon and hydrogen (sometimes oxygen) combines with oxygen gas to produce CO2 and water

Question 6

Diatomic Molecules

Answer 6

Hydrogen, nitrogen, oxygen, and all the halogens (BrINClHOF)

Question 7

Precipitate Reactions

Answer 7

Special types of double replacement reactions in which the products formed may be a solid, referred to as the precipitate

Question 8

If a substance is soluble…

Answer 8

It is aqueous and dissolves in water

Question 9

If a substance is insoluble…

Answer 9

It forms a solid precipitate