3 years ago

If you have an atom or copper, an ion of copper and an isotope of copper, what

Chemistry

1 answer:

alexgriva [62]3 years ago

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PLEASE HELP!! PLEASE??

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11. if the ph of a solution increases from 2.0 to 4.0, the h3o^ ion concentration o a decreases by a factor of 2. b. decreases b

Wittaler [7]

Option (B) is the right answer.

Hydronium ion ( $H_{3}O^{+}$ ) concentration decreases by the <u>factor of 100</u>, if the pH of a solution increases from 2.0 to 4.0.

The hydrogen ion concentration in water is expressed by pH. Specific to aqueous solutions, pH is the <u>negative logarithm</u> of the hydrogen ion (H+) concentration (mol/L) : $pH = -log_{10}[H_{3}O^{+} ]$

Acidic solutions are those with a pH under 7, and basic solutions are those with a pH over 7. At this temperature, solutions with a pH of 7 are neutral (e.g.<u> pure water</u>). The pH neutrality <u>relies on temperature, falling below 7 if the temperature rises above 25 °C</u>.

<h3>Given: </h3>

pH1( initial pH) = 2.0

pH2( initial pH) = 4.0

[H3O+] = initial hydronium concentration

[H3O+]* = final hydronium concentration

<h3>Formula used : </h3>

$pH = -log_{10}[H_{3}O^{+}]$

<h3>Solution: </h3>

$pH = - log_{10}[H_{3}O^{+}] \\\\= > 10^{-pH} = [H_{3}O^{+}] \\\\similarly, \\\\10^{-pH} = [H_{3}O^{+}]*\\\\ = > 10^{-4} = [H_{3}O^{+}]*\\\\Now, \frac{[H_{3}O^{+}]*}{[H_{3}O^{+}]} = 10^{-2}$