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Viva Questions: Determine percentage composition of NaOH in given mixture of NaOH + NaCl

Added on , Posted by inventionsbyhamid

Q1. What are the commercial names of NaHCO3 and Na2CO3?
Ans. NaHCO3 - Baking Soda, Na2CO3 - Washing Soda
Q2. Which indicator was used in the experiment?
Ans. Phenolphthalein (Sometimes examiner asks if you know the correct spelling)
Q3. What is the range of the indicator?
Ans. 8.0 - 9.6 (Many websites show slight difference in range)
Q4. What are the equivalent weights of NaOH, NaHCO3, Na2CO3?
Ans. NaOH - 40g, NaHCO3 - 84g , Na2CO3 - 106/2 = 53g
Q5. Draw the structure of phenolpthalein.
Ans. Phenolpthalein structure
If you were asked different questions kindly comment below the question along with answer so we can update the list. This list consists of sample questions that were asked and the examiner might ask totally unrelated question to your experiment.

Suitable for Students in year(s): 1

Suitable for branch(es): CSE, ECE, MECH, EEE, IT, CIVIL, and MAE

College: Guru Gobind Singh Indraprastha University(GGSIPU)

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