Problem: Which oxide below reacts with water to form a weak acid? and why?(1) MgO (2) N2O5 (3) Bi2O3 (4) Cl2O7 (5) P4O10

FREE Expert Solution

Recall that the conjugate acid of a base is simply the compound formed when a base gains a hydronium ion (H+). It's considered as an acid because it can lose H+ to reform the base. 

In the given options, we have:


a. MgO(s) + H2O(l)  → Mg(OH)2(aq)

The product is a base since it produces hydroxide ions in solution.

b. N2O5(s) + H2O(l)  → HNO3(aq)

The product is nitric acid which is a strong acid.

c. Bi2O3(s) + 3 H2O(l)  → 2 Bi(OH)3(aq)

The product is a base since it produces hydroxide ions in solution.

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Problem Details

Which oxide below reacts with water to form a weak acid? and why?

(1) MgO 

(2) N2O

(3) Bi2O

(4) Cl2O7 

(5) P4O10

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