In the above titration setup, if you introduce 15 mL of the NaOH with an unknown molarity into the flask and then add 5 drops of phenolphthalein indicator, what will you observe?
Correct answer: A. A pinkish color will appear throughout the solution.
- A. A pinkish color will appear throughout the solution.
- B. A blue color will appear throughout the solution.
- C. There will be a temporary pinkish color that will dissipate.
- D. There will be a temporary blue color that will dissipate.
- E. There will not be a color change.
Explanation
Phenolphthalein indicator is colorless below a pH of 8.3 but is red to pink in basic solutions above this pH. In this NaOH solution, it will be red to pink.
Last updated
About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
Practise Experimental Techniques in Chemistry
79 free Experimental Techniques in Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Which of the following techniques is used for the separation of insoluble Particlesfrom liquids?
Which of the following ways is used for classification of chromatography?
substance having very high vapour pressure at its melting point, on heatingwill show
Branch of chemistry that deals with e complete qualitative and quantitaive analysis of a substance
Rate of filtration can be increased by applying gentle suction