05.05.21 HW - Double Replacement Reactions and Solubility Rules - Amanda Whitney | Library

Double Replacement Reactions and Solubility Rules
Objectives:
determine the products of a double replacement reaction
reference the solubility rules to determine if ionic compounds are soluble or insoluble

Part 1: Review
Answer questions 1-5 to jog your memory on what double replacement reactions and the states of matter in a reaction are.

1

Recall the types of chemical reactions discussed earlier in the unit. Which of the following best describes a double replacement reaction?

1

In your own words, describe what happens to the reactants in a double replacement reaction.

1

Which of the following reactions is a double replacement reaction? Note that the equations are not balanced and that there may be more than one more answer.

1

The reaction below is an example of a double replacement reaction:

2NaOH + CuCO3 → Na2CO3 + Cu(OH2)

Which type of compounds react in double replacement reactions?

1

Match the states of matter with their symbol.

Draggable item		Corresponding Item
solid		(g)
solution / aqueous		(s)
gas		(aq)
liquid		(l)

Part 2: Predicting Products of Double Replacement Reactions
Before we can predict the states of matter of the products in a double replacement reaction, we must first make sure that we can predict the products of a double replacement reaction.  Follow the example below, then answer questions 

Examine the following equation:

Step 1: In order to determine the products, start off by determining the charge of each ion in the reactants.  Look at your polyatomic ions and periodic table if you are having trouble remembering them.  It may help to write them out above the formulas:

Step 2: Determine which products will form in the reactions.  Remember that, in a double replacement reaction, the ions "trade partners", and that oppositely charged ions always attract:

Step 3: Write your products.  Keep in mind that the charges of the ions do not change from the reactants side to the products side. Also remember that ionic compounds are always neutral, so you may need to add subscripts to your formulas:

Step 4: Balance the Equation.  If you are having trouble balancing, you may want to recheck your ionic equation formulas:

Your turn!  Follow the steps above as you answer questions 6-

1

Consider the two reactants below:

NaCl + AgNO3 → +

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

1

Consider the two reactants below:

NaOH + Cu(SO4)2 → +

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

1

Consider the two reactants below:

iron (III) nitrate + magnesium sulfate →

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

1

Consider the two reactants below:

nickel (II) chloride + potassium carbonate →

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

1

Write a balanched chemical equation for the reaction that takes place between the following reactants:

copper (II) chloride + beryllium oxide

I strongly encourage you to click on the 'show your work' box below and write things out.

Remember that you will not be able to write subscripts and that you can type your formulas like this in your answer: FeCl3

1

Write a balanched chemical equation for the reaction that takes place between the following reactants:

sodium phosphate + lead (II) nitrate

I strongly encourage you to click on the 'show your work' box below and write things out.

Remember that you will not be able to write subscripts and that you can type your formulas like this in your answer: FeCl3

Part 3: Solubility Rules
Why?

Double replacement reactions are one of the five common types of chemical reactions.  In a double replacement reaction, one of the products of the reaction is often a precipitate, a compound that is insoluble (doesn't dissolve) in water.  Because these reactions follow a predictable pattern, it is possible to identify the prodcts of a double replacement reaction using a list of rules that show which substances dissolve in water (are soluble) and which substances do not dissolve in water (are insoluble precipitates).  In this actiity, you will learn how to determine if a precipitate forms and how to determine the identity of the precipitate.

Model 1 - Mixing Two Solutions

The two solutions on the left containing the reactants are combined, resulting in the mixture on the right.  The products are shown in Beaker 3.  The solutions are shown at about a magnification of 109.

1

Most of the chemicals in this reaction are _____.

1

Match the particles present in Beaker 1, 2, and 3 with their formula.

Draggable item		Corresponding Item
		I-
		Na+
		NO3-
		Pb2+
		PbI2

1

Categorize the following substances as either reactants or products for the reaction above.

NaI (aq)
PbI2 (s)
NaNO3 (aq)
Pb(NO3)2 (aq)

Reactants
Products

1

Why do you think some of the spheres in Beaker 3 depicted as touching and shown on the bottom of the beaker?

1

What evidence is found in Beaker 3 that indicates that a chemical change has occured?

1

Some ions were aqueous as reactants and remained aqueous after the reaction occured. Identify these ions.

1

The ions identified in the question above are called spectator ions. Create a definition of spectator ions based on the model.

1

Write the complete balanced equation to represent the chemical reaction in Beaker 3 and indicate the states of matter.

The video in the Edpuzzle below discusses the reaction and diagram from above.  Remember a similar demo from the beginning of the unit?

If you do not have an edpuzzle account, log in using your DPSWatch and answer the questions in the Edpuzzle below before moving on.  You might also want to make changes to the previous set of questions. 

If the video does not work in the formative, click the following link, click in 'Log In with Google Account' and use your DPS log in to get access:  https://edpuzzle.com/assignments/6036652d2d151b4270ac3bc4/watch

A few things:  
You might want to take notes as you watch.
The video mentions page numbers - please do not worry about these!  
If you would like to reference the solubility rules, look at the back of your periodic table.  They are also located below the Edpuzzle.

Reference the solubility rules as you answer questions 20-21

1

Categorize the following substances as soluble or insoluble in water.

Ba(NO3)2
CrPO4
CaCO3
K3PO4
CaSO4
Pb(NO3)2
Ca(ClO4)2

Soluble
Insoluble

1

Determine whether the following substances form a solid or dissolve in water to form a solution.

lithium chlorate
strontium sulfate
silver (I) bromide
mercury (II) chloride
ammonium phosphate
calcium nitrate
copper (II) acetate

Forms solid
Dissolves in water

1

What do you understand best about predicting products of double replacement reactions and solubility rules?

1

05.05.21 HW - Double Replacement Reactions and Solubility Rules

Double Replacement Reactions and Solubility Rules

Part 1: Review

Recall the types of chemical reactions discussed earlier in the unit. Which of the following best describes a double replacement reaction?

In your own words, describe what happens to the reactants in a double replacement reaction.

Which of the following reactions is a double replacement reaction? Note that the equations are not balanced and that there may be more than one more answer.

The reaction below is an example of a double replacement reaction:2NaOH + CuCO3 → Na2CO3 + Cu(OH2)Which type of compounds react in double replacement reactions?

Match the states of matter with their symbol.

Part 2: Predicting Products of Double Replacement Reactions

Consider the two reactants below:NaCl + AgNO3 → ________ + ________Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:NaOH + Cu(SO4)2 → ________ + ________Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:iron (III) nitrate + magnesium sulfate → Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:nickel (II) chloride + potassium carbonate → Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Part 3: Solubility Rules

Most of the chemicals in this reaction are _____.

Match the particles present in Beaker 1, 2, and 3 with their formula.

Categorize the following substances as either reactants or products for the reaction above.

Why do you think some of the spheres in Beaker 3 depicted as touching and shown on the bottom of the beaker?

What evidence is found in Beaker 3 that indicates that a chemical change has occured?

Some ions were aqueous as reactants and remained aqueous after the reaction occured. Identify these ions.

The ions identified in the question above are called spectator ions. Create a definition of spectator ions based on the model.

Write the complete balanced equation to represent the chemical reaction in Beaker 3 and indicate the states of matter.

Categorize the following substances as soluble or insoluble in water.

Determine whether the following substances form a solid or dissolve in water to form a solution.

What do you understand best about predicting products of double replacement reactions and solubility rules?

What are you struggling with the most around predicting products of double replacement reactions and solubility rules?

The reaction below is an example of a double replacement reaction:

2NaOH + CuCO3 → Na2CO3 + Cu(OH2)

Which type of compounds react in double replacement reactions?

Consider the two reactants below:

NaCl + AgNO3 → +

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:

NaOH + Cu(SO4)2 → +

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:

iron (III) nitrate + magnesium sulfate →

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.

Consider the two reactants below:

nickel (II) chloride + potassium carbonate →

Which of the following are the products of this reaction? If you would like a space to write things out, click on the 'show your work' box below. Do not worry about balancing yet.