Question

determine pH with pH indicator strip / universal indicator solution 1) dil. hcl 2 ) dil NaOH 3) dil ethanoic acid 4 ) lemon juice 5) water 6) dil. sodium bicarbonate sol.​

Answer 1

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Finding pH of the following samples by using pH paper/universal indicator:

a.) Dilute Hydrochloric Acid

b.) Dilute NaOH solution

c.) Dilute Ethanoic Acid solution

d.) Lemon juice

e.) Water

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Hint: The nature of the chemicals used in laboratories is either basic, acidic or neutral. This characteristic depends on the ions they release. A chemical is said to be acidic if it releases H+ ions and basic if it releases OH– ions in its aqueous solutions.

Complete step by step answer:

- The pH is the measure of the acidic or basic power of a solution. It is a scale for measuring hydrogen ion concentration in a solution.

- The pH scale varies from 0 to 14. Neutral solution has a pH of 7.

- pH is defined as the negative logarithm of H+

ions. It can be mathematically represented as

pH=−log10[H+]

Answer 2

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