Solved Experiment 1, Part 4: What is the purpose of adding - Chegg
Experiment 1, Part 4: What is the purpose of adding the phenolphthalein indicator to the ammonia solution? to observe the shift in the equilibrium because ammonia and the ammonium ion are colorless to examine the equilibrium reaction between ammonia and phenolphthalein to apply a stress to the ammonia equilibrium causing the equilibrium to shift toward the products O to …
Solved Phenolphthalein is used as a visual indicator in a - Chegg
Question: Phenolphthalein is used as a visual indicator in a strong acid-strong base titration becauseQuestion 2 options:a) it has a pink color at the equivalence pointb) it is colorlessc) it has a pink color at its endpointd) its endpoint is closest to the equivalence point
Solved State whether each of the following is true or - Chegg
a) Phenolphthalein indicator is not affected by the pH of the solution. b) Phenolphthalein indicator changes colour close to the point of neutralisation which shows the end-point of the titration. c) When adding acid to base the phenolphthalein indicator changes colour from colourless to pink at the end point of the titration.
Solved The flask contains 10.0 mL of HCl and a few drops - Chegg
The flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains 0.170 M NaOH. It requires 15.1 mL of the NaOH solution to reach the end point of the titration. A buret filled with a titrant is held above a graduated cylinder containing an analyte solution. What is the initial concentration of HCl ?
Solved Phenolphthalein is an acid base indicator. What color
Question: Phenolphthalein is an acid base indicator. What color does it possess in the presence of excess hydrogen (i.e., hydronium) ions?What color does it possess in the presence of excess hydroxide ions?What color would you expect phenolphthalein to be after being added to the solution left after an alkali metal reacts completely with water?
Solved 4. When using phenolphthalein as the indicator in an - Chegg
4. When using phenolphthalein as the indicator in an acid-base titration, we usually choose to place the acid in the titration flask and ncutralize it with base from the buret, rather than to place the base in the flask and the acid in the buret. Explain the advantage of this choice.
Solved QUESTION 1 When titrating with phenolphthalein - Chegg
QUESTION 1 When titrating with phenolphthalein indicator, how can you tell when the endpoint is near (but not yet at the end point)? The solution gets warmer The solution turns a permanent pink The flashes of pink last longer The solution turns clear none of these QUESTION 2 If the solutions are the same concentration, a strong acid will have a ...
Solved phenolphthalein has a color change over the ph range
Question: phenolphthalein has a color change over the ph range of 8.2 to 10.0 methyl orange has a color change over the pH range of 3.2 to 4.4. Although the pehnolphthalein indicator is commonly ussed for neutralization reactions, why instead is the methyl orange indicator recommended for this experiment?
Acid-Base Indicator | Definition, Concept & Examples
2023年11月21日 · Phenolphthalein indicator: The phenolphthalein indicator is a weak acid that has two different structures based on whether it is in an alkali (pink) or acid (colorless) solution;
Solved A. blue Phenolphthalein is the acid/base indicator - Chegg
A. blue Phenolphthalein is the acid/base indicator used in today's experiment. What is the color of phenolphthalein in a basic solution such as NaOH? B. pink What is the color of phenolphthalein in an acidic solution such as HCI? C. yellow What color change will signal that you have reached D. colorless the end point in today's titration?