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1 vote
If you were to test a small

sample of soda lime with
universal indicator would it
register a pH above or
below 7? Explain your answer​

User Stanlick
by
7.9k points

1 Answer

4 votes

The soda contains CO2 that is dissolved CO2 reacts with water

CO2+H2O--->H2CO3

to form carbonic acid

this is a weak acid but it gives protons to water

H2CO3+H2O-->-HCO3+H30+

pH=-lg[H3O+]

[H3O+] is the molar concentration

Therefore the acid present in the solution causes the pH to be lower than 7. It can either be the H2CO3 if it is a carbonated beverage or citric acid from lime juice.

User Marco Shaw
by
7.7k points

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