Chapter 7, Problem 99A

Interpretation Introduction

Interpretation : The substance that is not a homogeneous mixture is to be identified.

Concept Introduction : Mixtures can be categorized as homogeneous or heterogeneous depending on how the components are distributed.

Answer to Problem 99A

Spaghetti sauce and river water are substances that are not a homogeneous mixture.

Explanation of Solution

A mixture is said to be homogenous if its composition is constant throughout.

A solution is another term for a homogeneous mixture.

Gold ring, cane sugar, window glass, and bottled water are homogeneous mixtures while spaghetti sauce and river water are not homogeneous mixtures.

The gold ring is made of gold with trace amounts of other metals but the composition is uniform so, it is a homogeneous mixture.

Spaghetti sauce contains a list of items but it is not uniform and the items are easily visible so it is not a homogeneous mixture. It belongs to a heterogeneous mixture.

Cane sugar contains sucrose with other reducing sugar but it is uniform and is not separable. So, it is a homogeneous mixture.

Window glass is a homogeneous mixture because it contains silica that is crystal clear in visibility.

River water contains water along with waste, some plastic papers, etc, and is easily separable. So, it is not a homogeneous mixture.

Bottle water contains only water in it and it is a homogeneous mixture.