Lab 17 Titie: house hold chemicals Aim: to measure the pH values of various house hold substances and to classify each substances as strong acid, weak acid, neutral, weak alkall or strong alkall Materials: universal indicator, pH chart, dropper, Ghouschold substance (solution, test tube, test tube rack, measuring cylinder, (vinegar, Dettol, sugar solution, alcohol, hydrogen peroxide, bleach). Method: 1. Number the clean test tubes 1-6 and pour in 5 mathrm(~cm)^3 of each household substance in the corresponding numbered test tube. E.g. 1-vinegar, 2-Dettol, 3-sugar solution, 4-alcohol, 5. hydrogen peroxide, 6- bleach 2. Add 5 drops of universal indicator solution to each of the test tubes and shake. What do you observe 3. Record your observations on a table 4. Classify each substance as strong acid, weak acid, neutral, strong alkall or weak alkali Observation Table showing: Test tube & Substance & & & Classification 1 & Vinegar & 3 & Weak acid 2 & Detrol & 4 & Weak acid 3 & Sugar solution & 7 & Neutral 4 & Alcohol & 5 & Weak acid 5 & Hydrogen peroxide & 6 & Weak acid 6 & Bleach & 12 & Strong alkali Discussion The mathrm(pH) value of the household substances were measured using a universal indicator solution. mathrm(pH) is the measure of how acidic and how alkaline a substance is. From the experiment it was note that vinegar, Detrol, alcohol and hydrogen peroxide were weak acids due to their low pH values, while bleach was a strong alkali due to its high pH value. The sugar solution was neutral with a pH of 7, indicating a balance between acidic and alkaline properties. When the universal indicator was added into each test tube, the acidic substances turned into shades of orange and red, while the alkaline substances turned into shade of blue. The neutral substance, sugar solution, did not cause any significant color change in the indicator solution. Conclusion In conclusion, the experiment effectively demonstrated that the classification of household substances based on their mathrm(pH) values.

Question

Lab 17 Titie: house hold chemicals Aim: to measure the pH values of various house hold substances and to classify each substances as strong acid, weak acid, neutral, weak alkall or strong alkall Materials: universal indicator, pH chart, dropper, Ghouschold substance (solution, test tube, test tube rack, measuring cylinder, (vinegar, Dettol, sugar solution, alcohol, hydrogen peroxide, bleach). Method: 1. Number the clean test tubes 1-6 and pour in 5 mathrm(~cm)^3 of each household substance in the corresponding numbered test tube. E.g. 1-vinegar, 2-Dettol, 3-sugar solution, 4-alcohol, 5. hydrogen peroxide, 6- bleach 2. Add 5 drops of universal indicator solution to each of the test tubes and shake. What do you observe 3. Record your observations on a table 4. Classify each substance as strong acid, weak acid, neutral, strong alkall or weak alkali Observation Table showing: Test tube & Substance & & & Classification 1 & Vinegar & 3 & Weak acid 2 & Detrol & 4 & Weak acid 3 & Sugar solution & 7 & Neutral 4 & Alcohol & 5 & Weak acid 5 & Hydrogen peroxide & 6 & Weak acid 6 & Bleach & 12 & Strong alkali Discussion The mathrm(pH) value of the household substances were measured using a universal indicator solution. mathrm(pH) is the measure of how acidic and how alkaline a substance is. From the experiment it was note that vinegar, Detrol, alcohol and hydrogen peroxide were weak acids due to their low pH values, while bleach was a strong alkali due to its high pH value. The sugar solution was neutral with a pH of 7, indicating a balance between acidic and alkaline properties. When the universal indicator was added into each test tube, the acidic substances turned into shades of orange and red, while the alkaline substances turned into shade of blue. The neutral substance, sugar solution, did not cause any significant color change in the indicator solution. Conclusion In conclusion, the experiment effectively demonstrated that the classification of household substances based on their mathrm(pH) values.

Answer 1

### The classification of the substances based on their pH values is as follows:1. Vinegar: Weak acid (pH = 3)2. Dettol: Weak acid (pH = 4)3. Sugar solution: Neutral (pH = 7)4. Alcohol: Weak acid (pH = 5)5. Hydrogen peroxide: Weak acid (pH = 6)6. Bleach: Strong alkali (pH = 12)

Answer 2

## Step 1: Understanding the Aim of the Experiment### The aim of this experiment is to measure the pH values of various household substances and classify them as strong acid, weak acid, neutral, weak alkali, or strong alkali. This classification is based on the pH scale, where:- **pH 7** indicates an alkaline (basic) substance. - Weak alkalis have a pH between 8 and 11. - Strong alkalis have a pH between 12 and 14.## Step 2: Observations from the Table### Based on the table provided:1. **Vinegar** has a pH of 3, which classifies it as a weak acid.2. **Dettol** has a pH of 4, which classifies it as a weak acid.3. **Sugar solution** has a pH of 7, which classifies it as neutral.4. **Alcohol** has a pH of 5, which classifies it as a weak acid.5. **Hydrogen peroxide** has a pH of 6, which classifies it as a weak acid.6. **Bleach** has a pH of 12, which classifies it as a strong alkali.## Step 3: Discussion of Results### When the universal indicator was added to each test tube:- Acidic substances (vinegar, Dettol, alcohol, hydrogen peroxide) caused the indicator to turn shades of orange or red, indicating their acidity.- The neutral substance (sugar solution) did not cause any significant color change in the indicator.- The alkaline substance (bleach) caused the indicator to turn blue, indicating its strong alkalinity.The pH values measured align with the expected classifications of these household substances.## Step 4: Conclusion### The experiment successfully demonstrated how household substances can be classified based on their pH values using a universal indicator. This classification helps understand the chemical nature of common substances and their potential uses or hazards.

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