Homework Answers
•if I wanted my solution become to red in color, I should add an ACID
•Methyl orange is a pH indicator used in titrations because of its clear and distinct colour change. It shows red colour in acidic and yellow colour in basic medium.
•Methyl orange has the property to color alkaline and neutral water yellow.
Weak acid-base indicator equilibria Step 1: Obtain a small test tube and add approximately 5mL wa...
Weak acid-base indicator equilibria
Step 1: Obtain a small test tube and add
approximately 5mL water. Next, add 10 drops of a methyl
violet indicator, and record the color of the
solution.
Step 2: Add ~4 drops of 6 M HCl to the solution,
and record the color of the solution.
(be careful when handling concentrated acids and bases)
Step 3: Add 6 M NaOH until the
color of the solution shifts back to its original color.
Estimate the pH...
First distilled water was added to a test tube. Then methyl orange indicator was added. The...
First distilled water was added to a test tube. Then methyl
orange indicator was added. The HCl and NaOH.
Part 1B: Acid/Base Indicator Equilibrium Chemical Reaction involved Initial color of the solution: 1. Adding HCI: a. Color change b. Equilibrium shifting 2. Adding NaOH: a. Color change b. Equilibrium shifting
4) Get a medium test tube and fill it with about 5 mL of water and...
4) Get a medium test tube and fill it with about 5 mL of water and a few drops of universal indicator. Take a soda straw and gently blow bubbles into the water. Note what happens to the color of the universal indicator What does the color of the universal indicator tell? Q. Balanced chemical equation:
four drops of indicator was added to a 50.00 mL sample of pond water. The sample...
four drops of indicator was added to a 50.00 mL sample of pond water. The sample was titrated with an EDTA solution that was determined to be 0.01421M. The initial burette reading was 1.16mL. When the color or the solution changed from red to blue, the burette reading was 23.96mL. a) calculate the volume of the EDTA solution added during the titration b) calculate the molarity of calcium in the water sample c) express the concentration of the water sample...
I added 2 mL of 0.2M CO(NO3)2 and continued to add drops of 12 M HCI...
I added 2 mL of 0.2M CO(NO3)2 and continued to add drops of 12 M HCI until I got a test tube that looked like: However I wanted my test tube to look like this So I added [Select)
Identify an unknown solution (1, 2, 3 and 4) and fill the vacancies in the table...
Identify an unknown solution (1, 2, 3 and 4) and fill
the vacancies in the table
Procedure
The unknown solutions are : HCl, NaOH,
Acetic acid, Na2CO3
Test each solution with litmus paper. Record the results in the
data table below.
Take little of each solution in a test tube and add 5 drops of
silver nitrate to each solution. Record the results in the data
table.
Take little of each solution in a test tube and add two drops...
Measurement and Accuracy Procedure Obtain 5 large test tubes (all the same size), a test tube...
Measurement and Accuracy Procedure Obtain 5 large test tubes (all the same size), a test tube rack, 3 beakers of colored water A-C, and 3 graduated cylinders. With a Sharpie, label the tubes 1-5 Measure 25 mL of solution from beaker A (red) using a clean graduated cylinder. Pour into tube 1. Measure 28 mL of solution from beaker B (yellow) using a clean graduated cylinder. Pour into tube 3. Measure 22 mL of solution from beaker C (blue) using...
Identify an unknown solution (1, 2, 3 and 4) and fill the vacancies in the table...
Identify an unknown solution (1, 2, 3 and 4) and fill the vacancies in the table Procedure The unknown solutions are : HCI, NaOH, Acetic acid, Na2CO3 1- Test each solution with litmus paper. Record the results in the data table below. 2- Take little of each solution in a test tube and add 5 drops of silver nitrate to each solution. Record the results in the data table. 3- Take little of each solution in a test tube and...
Methods A. Setting up your tubes: Label (1, 2, 3, 4, 5, and 6) the six...
Methods A. Setting up your tubes: Label (1, 2, 3, 4, 5, and 6) the six 1.5 ml size tubes at your station. Put 25 HL of red water solution into test tube number 1 Put 30 uL of yellow water solution into test tube number 3 Put 40 HL of blue water solution into test tube number 5 B. Constructing color spectrum: Make sure you record action in Table II below: Take 5 L from tube number 1 and...
Micro the unknown report Help! My unknown is gram+ cocci, endospore-forming, and then I went to...
Micro the unknown report Help! My unknown is gram+ cocci, endospore-forming, and then I went to the nitrate test. I added 5 drops for both reagent A&B first and it didn't turn red but something like light orange. Then I add the Zine. It turned red which below the powder but not the whole tube turn red.. Then I mixed them together. the red is gone and the tube become grey which is the powder's color. SO does it mean...
Weak acid-base indicator equilibria
Step 1: Obtain a small test tube and add
approximately 5mL water. Next, add 10 drops of a methyl
violet indicator, and record the color of the
solution.
Step 2: Add ~4 drops of 6 M HCl to the solution,
and record the color of the solution.
(be careful when handling concentrated acids and bases)
Step 3: Add 6 M NaOH until the
color of the solution shifts back to its original color.
Estimate the pH...
First distilled water was added to a test tube. Then methyl
orange indicator was added. The HCl and NaOH.
Part 1B: Acid/Base Indicator Equilibrium Chemical Reaction involved Initial color of the solution: 1. Adding HCI: a. Color change b. Equilibrium shifting 2. Adding NaOH: a. Color change b. Equilibrium shifting
4) Get a medium test tube and fill it with about 5 mL of water and a few drops of universal indicator. Take a soda straw and gently blow bubbles into the water. Note what happens to the color of the universal indicator What does the color of the universal indicator tell? Q. Balanced chemical equation:
I added 2 mL of 0.2M CO(NO3)2 and continued to add drops of 12 M HCI until I got a test tube that looked like: However I wanted my test tube to look like this So I added [Select)
Identify an unknown solution (1, 2, 3 and 4) and fill
the vacancies in the table
Procedure
The unknown solutions are : HCl, NaOH,
Acetic acid, Na2CO3
Test each solution with litmus paper. Record the results in the
data table below.
Take little of each solution in a test tube and add 5 drops of
silver nitrate to each solution. Record the results in the data
table.
Take little of each solution in a test tube and add two drops...
Identify an unknown solution (1, 2, 3 and 4) and fill the vacancies in the table Procedure The unknown solutions are : HCI, NaOH, Acetic acid, Na2CO3 1- Test each solution with litmus paper. Record the results in the data table below. 2- Take little of each solution in a test tube and add 5 drops of silver nitrate to each solution. Record the results in the data table. 3- Take little of each solution in a test tube and...
Methods A. Setting up your tubes: Label (1, 2, 3, 4, 5, and 6) the six 1.5 ml size tubes at your station. Put 25 HL of red water solution into test tube number 1 Put 30 uL of yellow water solution into test tube number 3 Put 40 HL of blue water solution into test tube number 5 B. Constructing color spectrum: Make sure you record action in Table II below: Take 5 L from tube number 1 and...
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