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Solubility Rules
Lab Observations
Balancing Act
Double Displacement
Miscellaneous
100
Is Cu(OH)2 soluble or insoluble?
Insoluble
100
What kind of flame test results from burning Na+?
What is a yellow-orange flame test
100
When the number of atoms are equal on both sides of the equation, this law has been fulfilled.
What is the Law of Conservation of Mass
100
Why do cations and anions switch in a double displacement reaction?
In order to form a compound with a stronger bond
100
Why can't a net ionic equation result when all the compounds in a double displacement reaction are soluble?
Because every ion cancels each other out
200
Is LiF soluble or insoluble?
Soluble
200
Which ionic compound is a bright yellow solid?
What is PbI2 or lead (II) iodide?
200
These are used to help balance chemical equations.
What are coefficients?
200
Why is it sometimes necessary to add coefficients in a double displacement reaction?
The + charges and - charges need to cancel each other out.
200
How do you know when a compound has to be split into ions?
The compound needs to be split into ions if the compound is soluble.
300
Why is it possible for water to dissolve some substances?
The partial positive charges and partial negative charges on water molecules are enough to overcome the attractive force between the positive and negative charges within an ionic compound.
300
Which ionic compound is cream colored?
What is AgBr or silver bromide?
300
Balance the following chemical equation. You must show all work and simplify your answer. Fe + O2 --> Fe2O3
4 Fe + 3O2 --> 2Fe2O3
300
Complete the reaction AgNO3 + KBr---->
What is the reaction AgNO3 + KBr ----> AgBr + KNO3
300
Given the reaction Hg(NO3)2 + 2NaCl ---> HgCl2 + 2NaNO3 Write the net ionic equation
Hg2+(aq) + 2Cl- (aq) -----> HgCl2 (s)
400
Why are ionic compounds with a +1 charge and a -1 charge more likely to dissolve?
The attractive force between a +1 charge and a -1 charge is not as strong.
400
What are two ways you can confirm that a substance has the I- ion?
1. Combine the substance with a compound which has a Pb2+ ion 2. Add chlorine water to the compound and check for a color change to reddish purple
400
Balance the following equation. You must show all work and simplify your answer! C2H6 + O2 ----> CO2 + H2O
2C2H6 + 7O2 ----> 4CO2 + 6H2O
400
Complete the reaction LiF + Ca(OH)2 ----->
2LiF + Ca(OH)2 ----> CaF2 + 2LiOH
400
Given the reaction K3PO4 + 3CuCl -----> Cu3PO4 + 3KCl Write the net ionic equation
3Cu+ (aq) + PO4 3-(aq) ------> Cu3PO4(s)
500
Why are phosphates often insoluble?
Phosphate has a -3 charge so the attractive force to a + charge is likely to be stronger.
500
You are not sure if a compound is NaCl. List three possible tests you can do in the lab and what you should see.
1. Do a flame test - a yellow orange color will confirm Na+ 2. Add Cl2 water - if there is no color change you probably have Cl- 3. Add a compound with Ag+ (a white precipitate confirms Cl-)
500
Balance the following equation. You must show all work and simplify your answer! Na + H2O ----> NaOH + H2
2Na + 2H2O -----> 2NaOH + H2
500
Complete the reaction (NH4)3PO4 + CoSO4 ----->
What is 2(NH4)3PO4 + 3CoSO4 ----> Co3(PO4)2 + 3(NH4)2SO4
500
Come up with a combination of two initial compounds which results in a net ionic equation whose coefficients add up to 6.
Answers will vary