Double Replacement Reaction Experiment

Prelab:

1. What ions and how many ions are present in the following chemicals:

  1. KOHc. KSCN
  2. Fe(NO3)3d. NaNO3

2. With the following ions in solution, what are all of the possible combinations of ions that could form a precipitate? (write the formulas for the compounds)

Na+K+Sr2+Ag+Fe3+

OH-NO3-SCN-Cl-PO43-

3. What are the clues that a chemical reaction has taken place?

4. How can you determine which product will form a precipitate?

For the Teacher:

Students will be combining various aqueous solutions to determine which combinations react. This can be done immediately after discussing balancing equations and types of reactions.

Do not tell student how to set up their data table. Let them figure out on their own an efficient way to do this and that they only need to do half the combinations.

For the Students:

The following chemicals will be used:

KOHAgNO3

Fe(NO3)3NaCl

KSCNNa3PO4

NaNO3Sr(NO3)2

Develop a method to determine which of the above chemicals react and complete the results & conclusions.

Double Replacement Lab Write-Up

RESULTS:

1. For the combined solutions where a reaction did occur, write a

balanced chemical equation. Include phases of the reactants and the products.

CONCLUSIONS:

1. Define the terms soluble, insoluble, slightly soluble, and

precipitate.

2. Describe how single replacement reactions differ from double

replacement reactions.

3. Do problems 33 b & d; 34b & d; 42; and 46 on pages 210 – 211

in your textbook.

4. Do problems 8 and 11b, d, and f from pages 245 and 246.

Further Investigation:

Description of what other question(s) were raised during the experiment that could be investigated with new experiments. Also a list of how the current experiment could be modified to eliminate or minimize the sources of error that occurred during the experiment. Be specific.

Double Replacement Reaction Experiment

Prelab:

1. What ions and how many ions are present in the following chemicals:

  1. KOHc. KSCN
  2. Fe(NO3)3d. NaNO3

2. With the following ions in solution, what are all of the possible combinations of ions that could form a precipitate? (write the formulas for the compounds)

Na+K+Sr2+Ag+Fe3+

OH-NO3-SCN-Cl-PO43-

3. What are the clues that a chemical reaction has taken place?

4. How can you determine which product will form a precipitate?

Purpose: Develop your own purpose for this lab.

Procedures:

Develop a method to determine which of the chemicals belowreact and complete the results & conclusions.

Include an organized way to record your procedure and results.

The following chemicals will be used:

KOHAgNO3KSCNNa3PO4

Fe(NO3)3NaClNaNO3Sr(NO3)2

Analysis:

RESULTS:

For the combined solutions where a reaction did occur, write abalanced chemical equation. Include phases of the reactants and the products.

CONCLUSIONS:

1. Define the terms soluble, insoluble, slightly soluble, and precipitate.

2. Describe how single replacement reactions differ from double replacement reactions.

3. Do problems 33 b & d; 34b & d; 42; and 46 on pages 210 – 211 in your textbook.

4. Do problems 8 and 11b, d, and f from pages 245 and 246.

Further Investigation:

Description of what other question(s) were raised during the experiment that could be investigated with new experiments. Also a list of how the current experiment could be modified to eliminate or minimize the sources of error that occurred during the experiment. Be specific.

Conclusion Statement:

Discuss how your lab results addressed the stated purpose of your lab.