21,22,23,24.

Chemistry
Tutor: None Selected Time limit: 1 Day

May 20th, 2015

21)

*acids are proton donors.

* they are sour in taste.

*they burn the skin.

* when reacted with metal they produce hydrogen gas.

* they turn the blue litmus paper to red.

22)

* bases are proton acceptors.

* they are bitter in taste.

* they are slippery in touch.

* they produce salt and water when reacted to acids.

*they turn red litmus paper to blue.

23) ACIDS:

all those substances which are H+ ions donors are known as acids.

BASES:

all those substances which accept the H+ ions are known as bases.

24a) acid: H2CO3  base: NaOH

24b) acid: HCl   base: NH3


May 20th, 2015

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