scenario: you are testing two different household solutions with your cabbage indicator, using the color key…

scenario: you are testing two different household solutions with your cabbage indicator, using the color key to the right. the second solution turns purple. a possible hydrogen ion concentration for this solution is: 1×10⁻² m 7×10⁻³ m 1×10⁻⁷ m 7×10⁻⁴ m done

scenario: you are testing two different household solutions with your cabbage indicator, using the color key to the right. the second solution turns purple. a possible hydrogen ion concentration for this solution is: 1×10⁻² m 7×10⁻³ m 1×10⁻⁷ m 7×10⁻⁴ m done

Answer

Answer:

D. $7\times 10^{-4}\text{ M}$

Explanation:

Step1: Identify purple - pH range

Purple corresponds to pH 3 - 4.

Step2: Recall pH formula

$pH=-\log[H^+]$.

Step3: Calculate $[H^+]$ for pH range

For pH = 3, $[H^+]=1\times 10^{-3}\text{ M}$; for pH = 4, $[H^+]=1\times 10^{-4}\text{ M}$. The value $7\times 10^{-4}\text{ M}$ is in this range.