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Crazy boy [7]
3 years ago
5

PLEASE HELP FAST!! WILL GIVE BRAINLIEST!!

Chemistry
2 answers:
Diano4ka-milaya [45]3 years ago
5 0
0.1M HCl              [H⁺]=0.1=10⁻¹       pH= - log 10⁻¹ = 1,  pH = 1
0.001M HCl          [H⁺]=0.001=10⁻³       pH= - log 10⁻³ = 3,  pH = 3
0.00001M HCl      [H⁺]=0.00001=10⁻⁵       pH= - log 10⁻⁵ = 5,  pH = 5
Distilled water                                           pH=7


0.00001 NaOH   [OH⁻]=10⁻⁵, [OH⁻][H⁺]=10⁻¹⁴, [H⁺]=10⁻¹⁴/10⁻⁵=10⁻⁹,
                           pH=9

0.001 NaOH   [OH⁻]=10⁻³, [OH⁻][H⁺]=10⁻¹⁴, [H⁺]=10⁻¹⁴/10⁻³=10⁻¹¹,
                           pH=11

0.1 NaOH   [OH⁻]=10⁻¹, [OH⁻][H⁺]=10⁻¹⁴, [H⁺]=10⁻¹⁴/10⁻¹=10⁻¹³,
                           pH=13

stepladder [879]3 years ago
5 0

Answer:

pH of 0.1M HCl=1

pH of 0.001M HCl=3

pH of 0.00001M HCl=5

pH of distilled water ,pH=7

pH of 0.00001 M NaOH =9

pH of 0.001 M NaOH=11

pH of 0.1 M NaOH=13.

Explanation:

We are given that For the acids, use the formula pH=-log[H+]

Because HCl has 1H^+ ion per formula unit

[H+]=Molarity

We are given that

0.1 M HCl means 0.1 molarity of H+ ions

[H+]=0.1M

Applying the given formula for calculating pH

Then pH of o.1MHCl=-log(0.1)

pH=-log(1\times10^{-1})

pH=-(log1-log10)

log 10=1, log 1=0

pH of 0.1M HCl=-(0-1)=1

pH of 0.001M HCl

pH=-log(1\times 10^{-3})

pH of 0.001M HCl=-(-3 log 10)=3

pH of 0.00001M HCl

pH=-log(1\times 10^{-5})

pH=-(-5)log10=5

pH of 0.00001M HCl=5

pH of distilled water ,pH=7 because water is neutral .

pH of 0.00001M NaOH

It means [OH-]=0.00001M=1\times 10^{-5}

We know that[OH-][H+]=10^{-14}

[H+]=\frac{10^{-14}}{[OH-]}

Substitute the value then we get the concentration of hydrogen ion

[H+]=\frac{10^{-14}}{10^{-5}}

[H+]=10^{-14+5}

Using identity:\frac{a^x}{a^y}=a^{x-y}

[H+]=10^{-9}

pH=-log(10^{-9})=-(-9) log 10=9

Hence, pH of 0.00001 M NaOH =9

pH of 0.001 M NaOH

[OH-]=10^{-3}

[H+]=\frac{10^{-14}}{10^{-3}}[/tex]

[H+]=10^{-14+3}=10^{-11}

pH=-log[H+]=-log(10^{-11})=11

Therefore, pH of 0.001 M NaOH=11

pHb of 0.1 M NaOH

[OH-]=10^{-1}

[H+]=\frac{10^{-14}}{10^{-1}}

[H+]=10^{-14+1}=10^{-13}

pH =-(log 10^{-13})

pH=-(-13 log 10)=13

Hence, pH of 0.1 M NaOH=13.

The pH of acids are less than the 7 and the pH value of bases is greater than the 7.

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