Acids and Bases Lab

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Acid and Bases Lab

By: Ismail Mur

Ms. Iman Buker

Date: 10/8/2014

Noor Syed, Ridhwaan Anayetullah (Table #3)

Purpose: Investigate the acidity of certain substances, and test the buffers of certain acids and bases.

Background Research:

Buffers: Buffers are important to many things, as they keep a substance's pH steady. They are important to humans, because they keep our blood plasma pH at 7.4 and if it goes too high or too low, that can affect us.

Acids: We use pH scales to determine whether something is an acid or not. 0 is the most acidic kind of solution and 14 is the most basic. Battery acids are very acidic. There are also acids in our stomach.

Bases: Bases accept hydrogen ions and remove them from solutions. They have a low H+ concentration. Seawater is a kind of base, but pure water is neutral. Bleach and oven cleaner are kinds of bases we use daily.

Hypothesis 1: If we use red and blue litmus paper and pH indicator paper, then we can find out whether a substance is an acid, base, or neutral.

Hypothesis 2: If we add lemon juice to Milk of Magnesia, Alka- Seltzer, and Rolaids, then we can make the solution neutral.


pH indicator paper

Test Substances


Small beakers or cups

Red and Blue Litmus Paper

Three samples of antacids

150 ml beakers

Graduated cylinders

pH Sensors

Lemon Juice Solution

Stirring rod



Place a small amount of the solution in the beaker. Label the beaker.

Dip a strip of red and blue litmus paper into the substance and record the color results and determine whether it is an acid, base, or neutral. Blue=Base, Red=Acid.

Dip a strip of pH indicator paper into the substance and compare the color to the color chart on the...