Acid and Bases Lab
By: Ismail Mur
Ms. Iman Buker
Noor Syed, Ridhwaan Anayetullah (Table #3)
Purpose: Investigate the acidity of certain substances, and test the buffers of certain acids and bases.
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
Small beakers or cups
Red and Blue Litmus Paper
Three samples of antacids
150 ml beakers
Lemon Juice Solution
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...