Question

(C) i and iiI’m just confused on how to answer this type of questions. Although I do know it forms water and salt, I’m not sure what salts are formed.

Answer 1

Step 1

The oxide: aluminium oxide => Al2O3

The hydroxide: sodium hydroxide => NaOH

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Step 2

The reaction between them:

Al2O3 + 2 NaOH => 2 NaAlO + H2O

This is a reaction of neutralization.

In this case, Al2O3 behaves as an acid oxide in presence of a base (NaOH)