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A scientist observes that after mixing a solid powder into water, the pH of the newly formed solution is 2.7. What can he infer from this observation?

The solution contains an indicator that has a pH of 2.7.

The solid powder contained hydrogen ions.

The pH indicator was used incorrectly.

The powder increased the hydrogen ion concentration of the solution.

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Greenleafable
The correct answer is
The powder increased the hydrogen ion concentration of the solution.

This means that the powder turned water into a more acidic substance since water's pH factor is 7, and things under 7 are acids.

Answer: The correct answer is' The powder increased the hydrogen ion concentration of the solution'.

Explanation:

The pH abbreviated as power of hydrogen is defined as negative logarithm of [tex]H^+[/tex] ion in the solution.

[tex]pH=-\log[H^+][/tex]

[tex]2.7=-\log[H^+][/tex]

[tex][H^+]=0.00199 M[/tex]

Whereas [tex]H^+[/tex] concentration in impure water is [tex]1\times 10^{-7 M[/tex]

The solution with pH value 2.7 was formed when solid powder was mixed into water which means that solid powder has increased the [tex]H^+[/tex] concentration in the water.

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