## Chemistry: Molecular Approach (4th Edition)

Published by Pearson

# Chapter 24 - Exercises - Page 1121: 23

#### Answer

$MgO$ is the flux

#### Work Step by Step

The material that reacts with the gangue to form a substance with a low melting point is the flux. In the given example, $MgO$ is the flux, because it reacts with $SiO$ (the gangue) to form $MgSiO_3$ which has a lower melting point.

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