Which of the following is NOT an alkali?

Endure

10 years ago

pls for christ sake an alkali is a water soluble base and of all NH3 commonly known as alkaline gas is very soluble in water making its use in the FOUNTAIN experiment

NH4OH IS THE SOLUBLE HYDROXIDE other alkalis are;

1) NaOH

2) KOH

3) NH4OH

4) CaOH



AND water insoluble hydroxides are those of Cu,Mg,Fe

@ADMIN ANSWER IS DEFINITELY *B* Check lamlad chapter11

brigelina

7 years ago

Myschool correct this thing na, the answer is B, an alkali is a base that is soluble in water, and anything with hydrogen bond is definitely soluble in water and what are the hydrgen bonds? They are H-F, H-O, H-N can you see that ammonia has H-N and besides Mg reacts with water very slowly except with steam, which gives MgO

smartychuks

10 years ago

by simple definition, an alkali is a base that dissolves in water to yield the OH ion

so the answer should have been A



all the best smarty

Myschool Ada

10 years ago

Corrections have been made. Thank you for your contributions.

NS XY

11 years ago

Mg does nt dissolve in water, in other word dia is no compound like Mg(OH)2

MosesCharles

4 years ago

My comment is coming late though..
NH3 is a weak base and not an acid. However, d ans should be Mg(OH)2 which is not soluble in water.

GoldwynNwodo

1 year ago

pls can you make people answer questions by topic

Dave333

4 years ago

- It dissociates completely but doesn't get completely dissolved in water and therefore, it is considered as a weak alkali. - Alkali metals such as sodium, potassium, etc. ... - Therefore, magnesium hydroxide is a strong base and hydroxides of most alkali metals and alkaline earth metals are strong bases.

Johncak316

2 years ago

Ammonia (NH3) can indeed react with water (H2O) to form ammonium ions (NH4+) and hydroxide ions (OH-). This reaction is known as the hydrolysis of ammonia.

Therefore, in the context of alkalis, ammonia (NH3) can be considered as a weak alkali. It is not as strong or soluble as other alkalis like sodium hydroxide (NaOH) or potassium hydroxide (KOH), but it can still produce hydroxide ions when dissolved in water.

In light of this, the compound that is NOT commonly classified as an alkali among the given options would be magnesium hydroxide (Mg(OH)2), option B.

myfathermyfather

7 years ago

The answer is A..

REF: Me

Sheriffcrown

5 years ago

A is the correct option which is NH3 (Ammonia)
since we all know that alkalis are soluble base. The other three options are soluble bases.

Element320

10 years ago

An alkali is a soluble base,therefore Mg(oH) is a base n not alkali

teey2flow

7 years ago

check d four authors chem textbook

JohnProjectile

1 year ago

The correct answer is A. NH3.

NH3 (ammonia) is a base, but it is not an alkali. Alkalis are a specific type of base that are highly soluble in water and are typically metal hydroxides.

Mg(OH)2 (magnesium hydroxide), Ca(OH)2 (calcium hydroxide), and NaOH (sodium hydroxide) are all alkalis.

NH3, on the other hand, is a weak base and is not an alkali.

Here's why:

- Alkalis are typically metal hydroxides (like NaOH, Ca(OH)2, etc.)
- NH3 is a non-metallic base (ammonia)
- Alkalis are highly soluble in water, whereas NH3 has limited solubility in water

So, while NH3 is a base, it doesn't fit the criteria for an alkali.

janet ben

12 years ago

how is mg(Oh)2 not an alkali