Step-by-step explanation:
To determine the correct order for the liquids from most acidic to most basic, the students can conduct an investigation using pH indicator strips. pH is a measure of the acidity or basicity of a substance.
Here's a step-by-step approach the students can follow:
1. Start by labeling four cups or containers with the names of the liquids: vinegar, apple juice, dish detergent, and milk.
2. Take a pH indicator strip and dip it into the first liquid, vinegar, for a few seconds. Make sure the strip is fully submerged.
3. Remove the strip from the vinegar and observe its color change. pH indicator strips typically change color based on the acidity or basicity of the substance being tested. The color change will indicate the approximate pH level of the liquid.
4. Compare the color of the pH indicator strip to the color chart provided with the strips. The chart will show the corresponding pH values for different colors.
5. Record the pH value for vinegar in a table or a list.
6. Repeat steps 2 to 5 for the remaining liquids: apple juice, dish detergent, and milk.
7. Once the pH values for all four liquids have been recorded, arrange them in order from the lowest (most acidic) to highest (most basic) pH value.
For example, if the pH values obtained for the liquids are: vinegar (pH 2), apple juice (pH 3), dish detergent (pH 9), and milk (pH 6), the correct order from most acidic to most basic would be vinegar, apple juice, milk, and dish detergent.
By conducting this investigation with pH indicator strips, the students can determine the correct order of the liquids based on their acidity or basicity. This process allows them to make observations, collect data, and draw conclusions about the relative pH levels of the substances.