the chemical reactions performed in the lab, science homework help

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timer Asked: Dec 12th, 2016
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Question description

Graded Assignment

Lab Report

Answer the question, using complete sentences. When you have finished, submit this assignment to your teacher by the due date for full credit.


Please look over your data carefully and answer the following questions based on your results.

List two chemical reactions that resulted in a colored precipitate – look for a red, orange, or yellow product. Be sure to list the names of all reactants and products for both reactions.

Consider all the reactions from the lab that gave a colored precipitate (red, orange or yellow). What ion or ions do these reactions have in common?

Answer:

(7 points)

Please answer the following questions based on your own lab results.

Score

List two chemical reactions from this lab that resulted in a white precipitate. For each reaction, list the names of all reactants and products.

Look over your results carefully – what ion or ions do the reactions that resulted in a white precipitate have in common with each other?

Answer:

(6 points)

Score

How many of the chemical reactions performed in the lab resulted in a precipitate? How many reactions did not? Define the term double-displacement in your own words, then make a general statement about the interaction of aqueous ionic compounds using the terms double-displacement reaction and precipitate.

Answer:

Your Score

___ of 20


Lab 4 - Materials and Lab Information If you are missing materials from your lab kit, notify your teacher immediately and call 1-866-K12CARE so that K12 can send you the missing item(s). Supplied in Kit:                  hand lens goggles, safety gloves, disposable microplate, 24 well barium nitrate (10 mL, 0.1 M) silver nitrate (10 mL, 0.2 M) sodium sulfate (20 mL, 0.1 M) barium chloride (20 mL, 0.1 M) sodium chromate (10 mL, 0.2 M) aluminum sulfate (20 mL, 0.1 M) sodium hydroxide (10 mL, 0.2 M) aluminum chloride (10 mL, 0.1 M) magnesium nitrate (20 mL, 0.1 M) magnesium sulfate (10 mL, 0.1 M) magnesium chloride (20 mL, 0.1 M) potassium chromate (10 mL, 0.2 M) potassium chloride (10 mL, 0.1 M) Also Needed (Supplied by student):   toothpicks 24 notebook/printer paper HYPOTHESIZE: Before you begin the lab, you should make a hypothesis about the lab. Write a hypothesis that describes how solutions may differ in terms of their ability to form a precipitate when mixed with other solutions. Write your hypothesis as an if-then statement, and base it on your everyday observations. Microplate Chemical Combinations: **Wash Microplate between each set! Set 1 1 2 3 4 5 6 A Ba(NO3)2 Na2SO4 Ba(NO3)2 Al2(SO4)3 Ba(NO3)2 Mg(NO3)2 Ba(NO3)2 MgCl2 Ba(NO3)2 AlCl3 X B Na2SO4 Al2(SO4)3 Na2SO4 Mg(NO3)2 Na2SO4 MgCl2 Na2SO4 AlCl3 X X C Al2(SO4)3 Mg(NO3)2 Al2(SO4)3 MgCl2 Al2(SO4)3 AlCl3 X X X D Mg(NO3)2 MgCl2 Mg(NO3)2 AlCl3 MgCl2 AlCl3 X X X 1 2 3 4 5 6 A KCl MgCl2 KCl Na2SO4 KCl NaOH KCl BaCl2 KCl MgSO4 X B MgCl2 Na2SO4 MgCl2 NaOH MgCl2 BaCl2 MgCl2 MgSO4 X X C Na2SO4 NaOH Na2SO4 BaCl2 Na2SO4 MgSO4 X X X D NaOH BaCl2 NaOH MgSO4 BaCl2 MgSO4 X X X 1 2 3 4 5 6 A BaCl2 Mg(NO3)2 BaCl2 Na2CrO4 BaCl2 Al2(SO4)3 BaCl2 K2CrO4 BaCl2 AgNO3 X B Mg(NO3)2 Na2CrO4 Mg(NO3)2 Al2(SO4)3 Mg(NO3)2 K2CrO4 Mg(NO3)2 AgNO3 X X C Na2CrO4 Al2(SO4)3 Na2CrO4 K2CrO4 Na2CrO4 AgNO3 X X X D Al2(SO4)3 AgNO3 Al2(SO4)3 K2CrO4 K2CrO4 AgNO3 X X X Set 2 Set 3 General Notes: - Read through all of the lab information in the course and in the lab manual before you begin! - This lab will be completed and graded as a lab report. Please ignore any mention in the course of a discussion. - In between each ‘set’ of the lab and at the end of the lab, make sure you clean your microplate thoroughly! Use a soapy water solution and q-tips to clean each well. Leave the microplate upside down to dry. Do not put your microplate in the dishwasher! - LAB SAFETY: make sure the room is well ventilated; wear gloves & goggles; do not taste, ingest, or smell chemicals; make sure you have an adult to supervise the experiment; make sure you have running water in the room where you do the lab; know your local poison control #; do not carry out the lab around any heat sources Data Collection: Make charts like the following to help you record your observations. Set Well Solution A Solution B 1 1A Ba(NO3)2 Na2SO4 1 2A Ba(NO3)2 Al2(SO4)3 1 3A Ba(NO3)2 Mg(NO3)2 Color change (Y/N) Precipitate Formed (Y/N) ⦙ Continue for all combinations from all sets Questions to Answer - Answers will be typed into the lab sheet and saved/submitted as a Word document into the Dropbox. BE VERY THOROUGH IN YOUR RESPONSES!!!! 1) List at least two chemical reactions that resulted in either a yellow, orange, or red precipitate. For each of these reactions, list the possible chemical name of the precipitate and other product (list the names of both products for each reaction). What do these reactions, and the others with yellow, orange, or red precipitates, have in common? 2) List at least two chemical reactions that resulted in a white precipitate. For each of these reactions, list the possible chemical name of the precipitate and other product (list the names of both products for each reaction). What do these reactions, and the others with white precipitates have in common? 3) Of all the reactions you performed, how many resulted in a precipitate and how many did not? Make a general statement about the interaction of aqueous ionic compounds, using the term doubledisplacement reaction. Once you have answered the above questions, open the lab report sheet (found in lesson ‘Lab: Salts 1’) and type in your answers to the questions on the lab report. Save your file and submit your final lab report as a Word document into the Dropbox. Make sure you are very thorough in answering the questions on the final lab report!

Tutor Answer

Ayshuman Thakur
School: UC Berkeley

Helloo, here is the work. please get to me in case of any review need be. Thanks at large

Data Collection: charts to help record observations.
SET

WELL

SOL A

SOL B

1

1A

Ba(NO3)2

Na2SO4

Color
change
(Y/N)
white

1
1

2A
3A

Ba(NO3)2
Ba(NO3)2

Al2(SO4)3
Mg(NO3)2

white
white

1

4A

Ba(NO3)2

MgCl2

white

1

5A

Ba(NO3)2

AlCl3

white

1

6A

X

X

SET

WELL

SOL A

SOL B

Color change
(Y/N)

1

1A

Na2SO4

Al2(SO4)3

white

1

2A

Na2SO4

Mg(NO3)2

colorless

1

3A

Na2SO4

MgCl2

colorless

1

4A

Na2SO4

AlCl3

white

1
1

5A
6A

X
X

Precipitate
Formed
(Y/N)
barium sulfate
(BaSO4)
BaSO4
Barium nitrate
Ba(NO3)2
Barium
chloride
Aluminum
nitrate
Al(NO3) 3

SET
Precipitate
Formed
(Y/N)
Aluminum
sulphate
Magnesium
sulphate
Magnesium
sulphate
Aluminum
sulphate

SET
SET

W...

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Anonymous
Wow this is really good.... didn't expect it. Sweet!!!!

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