Answer:
To prepare a simple acid-base indicator, you will need the following materials:
A small bottle or vial with a tight-fitting cap
Dried indicator powder (such as litmus, phenolphthalein, or bromothymol blue)
Distilled water
A pipette or dropper
Here are the steps to follow:
Measure out a small amount of the indicator powder, using about 0.1 to 0.5 grams for every 100 milliliters of water you plan to use.
Place the indicator powder in the bottle or vial.
Add distilled water to the bottle or vial, using a pipette or dropper to dispense the water. The amount of water you use should be based on the amount of indicator powder you measured out in step 1.
Close the cap on the bottle or vial tightly and shake the mixture well to dissolve the indicator powder.
Allow the mixture to sit for a few minutes to allow any sediment to settle to the bottom of the bottle.
Your acid-base indicator is now ready to use. To test the pH of a solution, simply add a few drops of the indicator to the solution and observe the color change. A color change indicates the presence of an acid or base in the solution.
Step-by-step explanation: