Based on the given pH values, let’s arrange the substances from the most acidic to the most alkaline.
Step-by-Step Solution:
1. Identify Substances with their pH Values:
- Bleach: 12.6
- Hydrochloric Acid: 1.0
- Soapy Water: 12.0
- Lemon Juice: 2.4
- Milk: 6.5
- Baking Soda: 9.0
- Toothpaste: 8.0
- Vinegar (Ethanoic Acid): 2.9
- Tomato Juice: 4.1
- Pure Water: 7.0
2. Order the Substances from Lowest pH (Most Acidic) to Highest pH (Most Alkaline):
[tex]\[
\begin{array}{|c|c|}
\hline \text{Name of substance} & \text{pH number} \\
\hline \text{(i) bleach} & 12.6 \\
\hline \text{(ii) hydrochloric acid} & 1.0 \\
\hline \text{(iii) soapy water} & 12.0 \\
\hline \text{(iv) lemon juice} & 2.4 \\
\hline \text{(v) milk} & 6.5 \\
\hline \text{(vi) baking soda} & 9.0 \\
\hline \text{(vii) toothpaste} & 8.0 \\
\hline \text{(viii) vinegar (ethanoic acid)} & 2.9 \\
\hline \text{(ix) tomato juice} & 4.1 \\
\hline \text{(x) pure water} & 7.0 \\
\hline
\end{array}
\][/tex]
3. Arrangement:
\begin{itemize}
\item Hydrochloric Acid (pH 1.0)
\item Lemon Juice (pH 2.4)
\item Vinegar (Ethanoic Acid) (pH 2.9)
\item Tomato Juice (pH 4.1)
\item Milk (pH 6.5)
\item Pure Water (pH 7.0)
\item Toothpaste (pH 8.0)
\item Baking Soda (pH 9.0)
\item Soapy Water (pH 12.0)
\item Bleach (pH 12.6)
\end{itemize}
Here is the final table:
[tex]\[
\begin{array}{|c|c|}
\hline \text{Name of substance} & \text{pH number} \\
\hline \text{(ii) hydrochloric acid} & 1.0 \\
\hline \text{(iv) lemon juice} & 2.4 \\
\hline \text{(viii) vinegar (ethanoic acid)} & 2.9 \\
\hline \text{(ix) tomato juice} & 4.1 \\
\hline \text{(v) milk} & 6.5 \\
\hline \text{(x) pure water} & 7.0 \\
\hline \text{(vii) toothpaste} & 8.0 \\
\hline \text{(vi) baking soda} & 9.0 \\
\hline \text{(iii) soapy water} & 12.0 \\
\hline \text{(i) bleach} & 12.6 \\
\hline
\end{array}
\][/tex]
This is the correct order from the most acidic to the most alkaline substances.
