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)
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)
Pre-Laboratory Questions: 1. Bromocresol green is chosen as the acid-base indicator. Within what pH range does it change color? What color should the indicator be at the endpoint of the titration? 2. Calculate the maximum number of moles of ammonia that can be generated when 1.073 grams of NH SCN reacts with excess Ca(OH)2, using all three possible reactions. 3. Calculate the number of moles of ammonia that must have reacted with boric acid if 21.55 ml of a 0.3143...
How does a metal indicator work for EDTA titration?
How does a metal indicator work for EDTA titration?
A weak acid indicator HIn is blue while its conjugate base In is green. Kaln for the indicator is 7.7 x 10*5 Over what pH range does the indicator change color? lower pH upper pH
A weak acid indicator Hin is blue while its conjugate base in is green. Kain for the indicator is 4.7 x 10-5 Over what pH range does the indicator change color? lower pH upper pH
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
4. Phenolphthalein is an acid-base indicator. indicator (cite your source: textbook, webite, etc.) Describe the general properties of an acid-base 5. Consider the following reaction at equilbrium: Explain the effect of increasing the concentration of Ni gas on the concentration of the reactants and products when a new equilibrium is reached. Indicate which concentrations will be increased and which concentrations will be decreased when a new equilbrium is reached. Na: Increased or decreased 02: Increased or decreased NO: Increased or...
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...