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Question 1

When does a precipitation reaction occur

Answer 1

A precipitation reaction occurs when two aqueous solutions (which means ionic compounds dissolved in water)combine to make an insoluble product (a precipitate) and a soluble product

Question 2

Write down the precipitate reaction

Answer 2

Rule:

Ion A+ + Ion B- = precipitate AB

Question 3

Refer to solubility rules

Answer 3

In a precipitation reaction

Question 4

Example of precipitation reaction (equation)

Answer 4

AB + CD - AD + CB

Question 5

Ionic equation example precipitation

Answer 5

Pb+2 + 2CI- = PbCl2

Question 6

Checklist for precipitation reaction

Answer 6

-define what a
precipitation reaction is
- what are two solutions you mixed
-what were the observations
-what is the precipitate going to be
-explain how you picked the precipitate, refer to specific solubility rules
-name the other product and say why it is not precipitate, refer to solubility rules
- write the ionic equation

Question 7

When does a displacement reaction occur

Answer 7

A displacement reaction occurs when a more reactive metal displaces a less reactive metal from its compound

Question 8

Write an equation for displacement reaction

Answer 8

AB + C = BC + A

Question 9

Write an example for an ionic equation for a displacement reaction

Answer 9

Mg(s) + Cu+2 - Cu (s) +Mg+2

Question 10

Checklist for displacement reaction

Answer 10

• define what a displacement reaction is
• State which metal is most reactive and which metal is least reactive. Refer to the activity series
• what displaces what? Why? Refer to the activity series
• what were the observations
• what was the spectator ion
• Right the ionic equation for the reaction

Question 11

When does a combination reaction occur

Answer 11

A combination reaction occurs when two reactants combined to make a single product that is more stable

Question 12

Write an equation for a combination reaction

Answer 12

A + B =AB

Question 13

Explain how combination reaction works

Answer 13

Atoms of different elements will react with each other if the new substance formed is more stable than the two original substances. They will do this by either sharing electrons and forming a can covalent bond or donating/excepting electrons and forming an ionic bond. Sometimes energy, heat is needed to start the reaction

Question 14

Checklist combination reaction

Answer 14

• define what a combination reaction is
• what were the reactants
• what was the product
• what were the observations
• link the observation to the product
• Give word and symbol equations

Question 15

When does thermal decomposition occur

Answer 15

Thermal decomposition reactions involve breaking one compound into two or more simpler compounds using heat. We will decompose dry carbonate powders in the lab by hitting them in a test tube of a flame. Sometimes the powder will change colour, but not always

Question 16

Equation for thermal decomposition reaction

Answer 16

AB = A + B

Question 17

Where’d equation for metal hydrogen carbonate

Answer 17

Metal hydrogen carbonate - Metal Carbonate + water + carbon dioxide

Question 18

Word equation for metal carbonate

Answer 18

Metal carbonate- Metal oxide plus carbon dioxide

Question 19

Thermal decomposition checklist

Answer 19

• define thermal decomposition
• what is the reactant
• what did you do to turn it into the product
• what were the products
• what were the observations? There may or may not be a colour change
• link the observation to the product
• how can we prove the presence of one of the products
• Word and chemical equations