Chapter 4 Answers

1. The chemicals that were being carried on the Mont Blanc were:

• 2 300 tons of picric acid

• 200 tons of TNT

• 35 tons of high-octane gasoline (benzole)

• 10 tons of gun cotton

Fill in the chart using the Centers for Disease Control and Prevention Pocket Guide

Lesson 4.2

Check for Understanding

1. Write out the general chemical equation for a neutralization chemical reaction.

   • acid + base → water + a compound

2. Describe how driving a car contributes to the problem of acid precipitation.

   • Driving a car requires the combustion of fossil fuels. This process releases pollutants that contribute to acid deposition.

3. Explain how liming can raise the pH of a lake affected by acid precipitation.

   • Lime is a base that reacts with the acid in the lake. This neutralizes the lake water, thus raising its pH. 

4. Why is it important to remove sulfur from coal and natural gas before they are burned?

   • Sulfur is a pollutant that contributes to acid deposition. I tis important to remove it from coal and natural gas to reduce the emissions released into the air. 

4.3

4.4

1. They both require the presence of oxygen.

2. Painting a steel beam helps protect it by keeping the steel beam isolated from the environmental factors that cause rusting.

3. Dipping nails in molten zinc will help protect them in two ways:

   1. The zinc acts like paint, isolating the steel from the environmental factors that could cause it to rust

   2. The zinc acts as a sacrificial mental if the nail is scratched.