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Georgia [21]
3 years ago
6

Help!!! Acids and Bases

Chemistry
2 answers:
Daniel [21]3 years ago
8 0

Answer:

In this theory, an acid is a substance that can release a proton (like in the Arrhenius theory) and a base is a substance that can accept a proton. A basic salt, such as Na+F-, generates OH- ions in water by taking protons from water itself (to make HF)

valentina_108 [34]3 years ago
4 0
ACID: A substance that accepts a lone pair of electrons

BASE: A substance that donates a lone pair of electrons

:D
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almond37 [142]
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6 0
3 years ago
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A 5.00g quantity of a diprotic acid was dissolved in water and made up exactly 250 mL. Calculate the molar mass if the acid is 2
MAXImum [283]

Answer:

The molar mass of the diprotic acid is 90.10 g/mol.

Explanation:

The acid is 25.0 mL of this solution required 11.1 mL of 1.00 KOH for neutralization.

H_2A+2KOH\rightarrow K_2A+2H_2O

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2  ( neutralization )

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of diprotic acid

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is KOH.

We are given:

n_1=2\\M_1=?\\V_1=25 mL\\n_2=1\\M_2=1.00 M\\V_2=11.1 mL

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2\times M_1\times 25=1\times 1.00\times 11.1}

M_1=\frac{1\times 1.00\times 11.1}{2\times 25}=0.222 M

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Moles of diprotic acid in 0.250 L solution :

=0.222 mol/L\times 0.250 L=0.0555 mol

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Moles(n)=\frac{mass(m)}{\text{Molar mass(M)}}

M=\frac{m}{n}=\frac{5.00 g}{0.0555 mol}=90.10 g/mol

The molar mass of the diprotic acid is 90.10 g/mol.

5 0
3 years ago
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