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3 years ago

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Chemistry

1 answer:

TEA [102]3 years ago

5 0

Answer:

Explanation:

n-factor of NaOH = 1

OH⁻ concentration = Normality of NaOH

= Molarity x n-factor

= 10⁻⁵ x 1

= 10⁻⁵

Now, pOH = -㏒(OH⁻)

pOH = -㏒(10⁻⁵)

pOH = 5

We know pH + pOH = 14

pH = 14 - 5 = 9

∴pH of 10⁻⁵M NaOH is 9

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Answer: The pH of the solution is 11.2

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml

moles of $Ba(OH)_2$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{0.867g}{171g/mol}=0.00507mol$ (1g=1000mg)

Now put all the given values in the formula of molality, we get

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pH is calculated by taking negative logarithm of hydrogen ion concentration.

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According to stoichiometry,

1 mole of $Ba(OH)_2$ gives 2 mole of $OH^-$

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$pOH=-\log[0.0596]=2.82$

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Answer:

The balanced equation for this reaction is C2H2 + 502 + 4H2O + 3C02. What volume of carbon dioxide is produced when 2.8 L of oxygen are consumed? 25Explanation:

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2 years ago

Bauxite is an ore that contains the element aluminum. If you obtained 108 grams of aluminum from an ore sample that initially we

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3 years ago

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vesna_86 [32]

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3 years ago

...hheeelppppp plzzz?? ​

...hheeelppppp plzzz??