ACIA Base Lad INSTRUCTIONS Acid-base indicators are used to let you know whether the solution you are working with is acidic or basic. We have many acid-base indicators available to us today, but the first indicators were made from natural compounds. The indicator that you will be making comes from purple cabbage and is simply called cabbage extract indicator. Procedure: Google red cabbage as an acid-base indicator. Go to websites to learn how to make red cabbage
pH
indicator Make your own
pH
paper strips using red cabbage indicator with filter paper (or coffee filter). Use the research to design a lab to complete at home. Test solutions of vinegar, baking soda (dissolve a small amount,
1tsp
, of baking soda into
15mL
of water first) and plain water with the pH strips. Test at least 4 other household foods/beverages as non-toxic chemicals to test for
pH
values. items. Keep a small amount of the liquid indicator for this step: Slowly add the cabbage extract indicator solution into a small amount of vinegar (approximately
15ml
) in a cup just until the colour changes. Repeat this with a solution of baking soda (1 teaspoon in
15ml
of water) until you see a colour change. Mix them together and record what happens. What happens if you mix the vinegar and baking soda solutions together after they have the indicator in them? What solution is this reaction similar to and why? To Submit: Do not submit a full formal lab report for this lab. In a word document, complete only the following sections, but still follow the formatting required for these sections in a formal lab report (consult the "Resources" module at the end of the Brightspace content for an example). Consult the marking rubric to know how you will be assessed. Data: Include (with in-text, APA reference(s)) a table of approximate colours of red cabbage indicator solutions at different
pH
levels and a standard
pH
table showing colours and numbers to which the results can be compared. Pictures of your substances and results. A table showing your substances and their
pH
, based on the colours. State whether each is acid, base or neutral. Discussion questions: What is the significance of "neutral" on the
pH
scale? What is the colour and
pH
number of a neutral solution? What happens if you mix the vinegar and baking soda solutions together after they have the indicator in them? What solution is this reaction similar to and why? With respect to your reference charts posted in the Data section, explain strong and weak acids and bases, and give examples from your experiment as references for each. What could you do to neutralize a spill of concentrated acid before cleaning it up to ensure you didn't get burned? Reference information from the text as well as your observations from the experiment (Hint: the mixing of the vinegar and baking soda solutions and noting the colour change) Include references in APA format at the end of your document (this list must include the full references for the in-text citations used with the data table).