Chemistry College

. Calculate the pH value of a solution in which [OH- ] = 1.49 × 10−8M

Answers

Answer 1

Answer:

The pH of the solution is 6.17.

Explanation:

To find the pH of the solution, we have to first calculate its pOH using the formula:

[tex]\boxed{\mathrm{pOH = - log_{10}[OH^-]}}[/tex]

Substituting the given value of [OH⁻] into the formula, we get:

[tex]\mathrm{pOH = -log_{10}(1.49 \times 10^{-8})}[/tex]

        [tex]= \bf 7.83[/tex]

Now that we have the value of the pOH of the solution, we can find its pH using the following formula:

[tex]\boxed{\mathrm{pH + pOH = 14}}[/tex]

∴ [tex]\mathrm{pH} + 7.83 = 14[/tex]

⇒ [tex]\mathrm{pH } = 14 - 7.83[/tex]

⇒ [tex]\mathrm{pH } = \bf 6.17[/tex]

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Define chemical reaction with examples

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Answers

Answer:

A chemical reaction is a process where bonds are formed between reactant elements causing interaction hence products are formed.

The two types of chemical reaction:

[tex]{ \boxed{ { \rm{ \bold{ \dashrightarrow \: reversible \: reaction}}}}}[/tex]

This is a reaction where reactants interact chemically to form respective products and also products can react to reverse the reaction (to form reactants).

An example of reaction of hydrogen and oxygen:

[tex]{ \rm{2H_{2(aq)} +O_{2(aq)} \: {}{ ^{ \dashrightarrow}_{ \dashleftarrow} \: 2H _{2}O _{(l)} }}}[/tex]

[tex]{ \boxed{ \rm{ \bold{ \dashrightarrow irreversible \: reaction}}}}[/tex]

It is a one way reaction, cannot be reversed

[tex]{ \rm{Mg_{(s)} + N _{2(g) \: }\rightarrow \: \: Mg _{3} N _{2(s)} }}[/tex]

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