F2 - SEM2 - Common acids and alkalis - 9.1 Common acids and alkalis Flashcards by Reggie YIM | Brainscape

Q

What are the acids found in below items?

soft drinks, vinegar, oranges and lemons

Acids

A

soft drinks - carbonic acid
vinegar - ethanoic acid
oranges and lemons - citric acid

Acids

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Q

Why does oranges and lemons taste sour?

Acids

A

they contain acids

Acids

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Q

Where are acids found besides food and seasonings?

Acids

A

personal care products - lotion, shampoo
household cleaner - toilet cleaner
school laboratory - hydrochloric acid, sulphuric acid and nitric acid

Acids

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Q

What are the characteristics of alkalis?

Alkalis

A

slippery
have a bitter taste

Alkalis

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Q

Where are alkalis found?

Alkalis

A

food - rice dumpling, noodles, baking soda
personal care products - tooth paste
household products - glass cleaner and kitchen cleaner
school laboratory - sodium hydroxide solution, calcium hydroxide solution (“lime water”) and ammonia solution

Alkalis

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Q

Why do we need to handle acids and alaklis safely?

Handling acids and alkalines safely

A

They are irritant and corrosive
burn our skin and eyes

Handling acids and alkalines safely

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Q

What are the safety precautions when handling acids and alkalis in laboratory?

Handling acids and alkalines safely

A

DO
* read hazard warning label on the bottles and identify the risk
* wear safety spectacles, laboratory coat and disposable gloves
* pour waste solution into suitable waste bottle
* wash hand thoroughly after handling acids or alkalis

DON’T
* never taste acids and alkalis
* don’t fill more than 1/3 of the container
* don’t mix acids or alkalis with other chemicals without getting teacher’s approval
* don’t pour waste solution into sink

Handling acids and alkalines safely

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Q

What should you do when an accident involves acids or alkalis occurs in the laboratory?

Handling acids and alkalines safely

A

keep calm and report to teacher at once
wash the affected area under running water for at least 10 minutes
wash with eye wash bottle if eye is affected
remove contaminated clothes

Handling acids and alkalines safely

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