Question

Classify these salts as acidic, basic, or neutral. KCL, NH4Br, K2CO3, NaCN, LiClO4? This is what I put but got it wrong: KCl = basic NH4Br = acidic K2CO3 = basic NaCN = basic LiClO = Neutral Can someone me what I did wrong, thanks.

Answer 1

In classifying salts as neutral, acidic, or basic, it is important to take note of the strength of the acids and bases that they come from. A strong acid and strong base produce a neutral salt. A weak acid and strong base produce a basic salt. A strong acid and weak base produce an acidic salt. So the answers must be:

KCl = neutral (from HCl and KOH)
NH4Br = acidic (from NH4 and HBr)
K2CO3 = basic (from KOH and H2CO3)
NaCN = basic (from NaOH and HCN)
LiClO = basic (from LiOH and HClO)

Answer 2

KCl : neutral

NH₄Br : acidic

K₂CO₃ : basic

NaCN : basic

LiClO : basic

Further explanation

Salt is an ion compound consisting of metal cations and residual acid anions. Cation salts can come from a base and anions come from acids. So that each salt has a base component and an acid component

So there are 4 properties of salt

1. salts from strong acids and strong bases are neutral

2. salts from strong acids and weak bases are acidic

3. salts from weak acids and strong bases are basic

4. salts of weak acids and weak bases depend on the value of the ionization constant of the acid and its base (Ka and Kb)

Ka> Kb is acidic

Ka <Kb is basic

Ka = Kb is neutral

•  1. KCL,

salt of strong acid HCl and strong base of KOH, neutral

• 2. NH₄Br,

salt of strong acid HBr and weak base NH₄OH, acidic

•  3. K₂CO₃,

salt of H₂CO₃ weak acid and strong base KOH, basic

• 4. NaCN,

salt of a weak acid HCN and a strong base NaOH, basic

• 5. LiClO

salt of a weak acid HClO and a strong base LiOH, basic

Learn more

the Bronsted-Lowry definition of an acid

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the Bronsted-Lowry definition of a base

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the acids and the bases in the chemical equation according to Bronsted-Lowry Theory

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Keywords:  acid, base, salt