Define an acid-base indicator. Explain why phenolphthalein is chosen as an indicator for the titration for...
Define an acid-base indicator. Explain why phenolphthalein is chosen as an indicator for the titration for standardizing NaOH, determining % composition of KHP, and determining the acid content of vinegar. (Look up for the Ka for the indicator online and explain why this indicator is chosen for these titrations)
Homework Answers
KHP is act acid and NaOH is base.
pH at equivalence point of this titration nearly 8.5
pH range of Phenolphthalein = 8.2 - 10.0
thus
pH at equivalence point fall in the pH range of Phenolphthalein indicator.
Hence
phenolphthalein is chosen as an indicator for the titration for standardizing NaOH.
From this titration we can calculate the % composition of KHP.
when
we use acetic acid instead of KHP then we can calculate acid content of vinegar.
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Define an acid-base indicator. Explain why phenolphthalein is
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Phenolphthalein is used in titrating KHP with NaOH. Why? Is phenolphthalein required for a potentiometric titration...
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Which of the following is the acid-base combination that cannot use phenolphthalein as an acid-base indicator?...
Which of the following is the acid-base combination that cannot use phenolphthalein as an acid-base indicator? Select one: a. HBr and NH3 b. HF and KOH C. CH2COOH and NaOH d. HCI and LiOH
8. Prepare a titration curve for the titration of KHP with NaOH using the EXCEL spreadsheet...
8. Prepare a titration curve for the titration of KHP with NaOH using the EXCEL spreadsheet template. Assume concentrations of 0.1 M for KHP and NaOH in preparing the titration curve. Attach a copy of the titration curve and explain why phenolphthalein can be used as the indicator for the titration. (3 pts) NOTE: see phthalic acid for the K, value for KHP.
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1 & 2 se of using phenolphthalein for an acid-base titration? 2) What is the color...
1 & 2
se of using phenolphthalein for an acid-base titration? 2) What is the color of phenolphthalein indicator in: a. Acidic solution b. Basic solution
4. Phenolphthalein is an acid-base indicator. indicator (cite your source: textbook, webite, etc....
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ELIMINARY EXERCISES: Experiment 16 Acid-Base Titrations- Define the following terms associated with titrations: a. standard solutions are base Soluchon When the molanty is alrea known. b. ondpoint is the pant at which color change occurs. C. indicator quie. Watersplutte dues that have one color in basic. 2. Write the balanced formula equation and the net ionic equation for the reaction of sodium hydroxide with hydrochloric acid. Formula equation: Net Ionic equation: 3. What is the molarity of a solution prepared...
ACID-BASE TITRATION 4) What is the purpose of the indicator? 5) Does the indicator participate in the reaction with the acid and base? 6) Define endpoint. Define equivalence point. Calculate the volume in mL of 0.100M NaOH required to neutralize 2.50mL of 0.150M HC2H302 HC2H302(aq) + NaOH(aq) + NaC2H2O2(aq) + H2O(1)
Which of the following is the acid-base combination that cannot use phenolphthalein as an acid-base indicator? Select one: a. HBr and NH3 b. HF and KOH C. CH2COOH and NaOH d. HCI and LiOH
8. Prepare a titration curve for the titration of KHP with NaOH using the EXCEL spreadsheet template. Assume concentrations of 0.1 M for KHP and NaOH in preparing the titration curve. Attach a copy of the titration curve and explain why phenolphthalein can be used as the indicator for the titration. (3 pts) NOTE: see phthalic acid for the K, value for KHP.
QUESTION 1 6 points Save Answer The purpose of an indicator in an acid-base titration is to indicate the of the titration. Use Table 10.2 for the following question. If an acidic solution is titrated with a basic solution and methyl violet is used as an indicator, the solution color will change from to QUESTION 2 3 points Save Answer The molarity of a solution prepared by dissolving 17.0 g of hydrochloric acid (HCI (aq) in 133 mL of water...
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se of using phenolphthalein for an acid-base titration? 2) What is the color of phenolphthalein indicator in: a. Acidic solution b. Basic solution
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