Acid rain pp

1. Acids and Bases SHS CAPT lab Acid Rain L. Allen Stonington High School

Acid rain contributes to the corrosion of metals and the deterioration of paint and stone. These effects reduce the value of buildings, bridges, cultural objects (such as statues, monuments, and tombstones), and cars.

Acid rain forms when certain molecules in the atmosphere combine with water, forming acidic compounds that dissolve in the water that becomes rain.

The gases sulfur dioxide (SO 2 ) and various nitrogen oxides (NO x ) are mainly responsible for the increase in acidity.

These gases are primarily created by industrial factories, coal-fired power plants, and car emissions.

The gases SO 2and NO xare thought to be carried long distances by air currents. Storm systems also move long distances, carrying with them any pollutants they may pick up.

Every liquid is either an acid or a base T or F

There are a variety of strengths of acids and bases. T or F

pH is a measure of ____ ions.

Hydroxide (OH-)

Hydrogen (H+)

Aqueous

None of the Above

An aqueous solution is one that has compounds dissolved in water. T or F

5. What are the main causes of acid rain?

6. What are the effects of acid rain in the environment and on building materials?

1. A solution with a pH of 7 is considered to be neutral. It is neither an acid nor a base. Distilled water (H 2 0) has a pH of 7.

2. There are a variety of strengths in acids and bases. They include... - Strong Acid (Near pH 1) - Weak Acid (Near pH 6) - Strong Base (Near pH 14) - Weak Base (Near pH 8)

pH is a measure of hydrogen ions (H + ). Hydrogen ions have lost their electron.

4. An aqueous solution is one where the solvent is water. Acids and bases are often placed in water to dilute them.

5. Pollution from burning of fossil fuels (sulfur dioxide SO 2and nitrogen oxides NOx).

6.Acid rain damages plants, disturbs the chemical balance in lakes and rivers (affecting fish reproduction), and damages man-made structures (i.e. buildings, statues, etc)

You have 3 types of materials: quartz, marble and granite.

Which one will be most resistant to acid rain?

What can we do to figure it out?

What can we use to simulate acid rain?

How can we compare the effect of the acid rain with that of regular rain?

What kind of data can you take?

QualitativeData:

Do youseeany changes? (bubbles, color changes, etc)

QuantitativeData:

Can youmeasureany changes? (pH, mass, volume, etc.)

We can use vinegar instead of the milder acid in rain.That will speed things up!

If we see bubbles, something is happening

If we can see a change in the pH of a solution after it is poured over some rocks, those rocks are breaking down into the acid.

We could weigh the rocks before they go into the acid, and if they weigh less after some time in solution, they have broken down.

We could compare the volume of rock before and after exposure to acid rain.

Read the lab sheets over quickly.

Come up with a general idea of how you and your partner will conduct this experiment.

Look around the room to see what equipment we have, what materials you have available.

Ask questions to clarify any points you arent sure about.

Finalize your experimental design with your partner.

Read the lab sheets thoroughly

Look up acid rain and write a short background paragraph for your lab report.IYOW please!

Write your procedure for this lab so that you can conduct the whole lab in one period.

Create a data table where you can put all the information you get in your experiment.

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Acid rain pp