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aalyn [17]
4 years ago
6

When titrating a strong monoprotic acid and koh at 25°c, the ph will be equal too?

Chemistry
2 answers:
tangare [24]4 years ago
3 0
When titrating a strong monoprotic acid and KOH at 25 degrees Celcius, the pH will be approximately equal to 7.00. Since a strong acid and a strong base reacts through a neutralization reaction. The pH of a neutral solution is 7.00. <span />
o-na [289]4 years ago
3 0

The pH will be equal to \boxed{\text{7}} in the titration of a strong monoprotic acid and KOH at {\text{25}}^\circ{\text{C}}.

Further Explanation:

<u>Neutralization reaction: </u>

It is the reaction that occurs between an acid and a base in order to form salt and water. It is named so as it neutralizes the excess amount of hydrogen or hydroxide ions present in the solution. It is used to decrease the acidity in the stomach, wastewater treatment, antacid tablets, and to control the pH of soil. An example of a neutralization reaction is,

{\text{HCl}}+{\text{NaOH}}\to{\text{NaCl}}+{{\text{H}}_2}{\text{O}}

Titration:

It is a laboratory technique to determine the concentration of an unknown solution with the help of a known concentration. The known solution (titrant) is added from burette to a known quantity of unknown solution (analyte).

Consider HA to be a strong monoprotic acid. KOH is also a strong base. The titration between HA and KOH would result in the following neutralization reaction:

{\text{HA}}+{\text{KOH}}\to{\text{KA}}+{{\text{H}}_{\text{2}}}{\text{O}}

Since both acids and bases are strong, complete neutralization occurs and salt and water are formed as products. The resultant solution will be neutral and therefore its pH at {\text{25}}^\circ{\text{C}} will be equal to 7.

Learn more:

1. Name the salts produced in each of the neutralization reactions: brainly.com/question/10528663

2. Determine the moles of water produced: brainly.com/question/1405182

Answer details:

Grade: Senior school

Subject: Chemistry

Chapter: Acid-base reactions

Keywords: Acids, bases, salt, water, KOH, HA, H2O, KA, titration, technique, analyte, titrant, known, unknown, neutralization reaction, hydrogen, hydroxide ion, strong monoprotic acid, pH, 7, neutral.

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A 0.04328 g sample of gas occupies 10.0-mL at 294.0 K and 1.10 atm. Upon further analysis, the compound is found to be 25.305% C
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Answer:

<u>The molecular formula of the gas sample = C_2Cl_2 </u>

<u>Lewis structure is shown in the image below.</u>

<u>The geometry around each carbon atom is linear.</u>

Explanation:

Given that:

Temperature = 294.0 K

V = 10.0 mL = 0.01 L ( 1 mL = 0.001 L )

Pressure = 1.10 atm

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L atm/ K mol  

Applying the equation as:

1.10 atm × 0.01 L = n ×0.0821 L atm/ K mol  × 294.0 K  

⇒n = 0.0004557 mol

Given, mass = 0.04328 g

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

0.0004557\ mole= \frac{0.04328\ g}{Molar\ mass}

<u>Molar mass of the gas sample = 94.9747 g/mol</u>

Given that:-

% of C = 25.305

Molar mass of C = 12.0107 g/mol

% moles of C = 25.305 / 12.0107 = 2.1069

% of Cl = 74.695

Molar mass of Cl = 35.453 g/mol

% moles of Cl = 74.695 / 35.453 = 2.1069

Taking the simplest ratio for C and Cl as:

2.1069 : 2.1069  = 1 : 1

<u>The empirical formula is = CCl</u>

Molecular formulas is the actual number of atoms of each element in the compound while empirical formulas is the simplest or reduced ratio of the elements in the compound.

Thus,  

Molecular mass = n × Empirical mass

Where, n is any positive number from 1, 2, 3...

Mass from the Empirical formula = 12 + 35.5 = 47.5 g/mol

Molar mass = 94.9747 g/mol

So,  

Molecular mass = n × Empirical mass

94.9747 = n × 47.5

⇒ n = 2

<u>The molecular formula of the gas sample = C_2Cl_2 </u>

Also,

Valence electrons of carbon = 4

Valence electrons of Chlorine = 7  

The total number of the valence electrons  = 4*2 + 7*2 = 22

The Lewis structure is drawn in such a way that the octet of each atom in the molecule is complete. So,  

The Lewis structure is shown in the image below.

According to the theory, the atoms will form a geometry in such a way that there is minimum repulsion and maximum stability.  The carbon atoms are sp hybridized.

<u>So, it is of linear shape.</u>

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