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2 years ago

The following is the reaction showing the complete neutralization of calcium hydroxide (a base) with phosphoric acid:

Chemistry

1 answer:

vodka [1.7K]2 years ago

5 0

9.17 milliliters (mL) of the acid are needed to completely neutralize the base in this reaction.

<h3>What is a neutralization reaction</h3>

A neutralization reaction is a reaction between an acid and a base to produce a salt and water only.

The process of reacting given volume of acids or bases to determine the concentration or volume of either the acid or base required for neutralization is known as titration in volumetric analysis.

The formula to determine the volume of the acid required is given below:

$\frac{C_{a}V_{a}}{C_{b}V_{b}} = \frac {N_{a}}{N_{b}}$

where $V_{a$ is the volume of acid required

$V_{a} = \frac {C_{b}V_{b}N_{a}}{C_{a}N_{b}}$

Concentration of base, Cb = (3.51/74)/0.75 = 0.063 M

Vb = 50. 0 mL

Ca = 0.229 M

Na = 2

Nb = 3

Va = (0.063 * 50 * 2)/(0.229 * 3)

Va = 9.17 mL

In conclusion, the volume of the acid is determined from the concentration, volume and mole ratio of the reaction.

Learn more about titration at: brainly.com/question/186765

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A solution is made by mixing 55.g of thiophene C4H4S and 65.g of acetyl bromide CH3COBr.

EleoNora [17]

Answer:

Mole fraction of C₄H₄S = 0.55

Explanation:

Mole fraction is moles of solute / Total moles

Total moles are the sum of moles of solute + moles of solvent.

Let's find out the moles of our solute and our solvent.

Mass of solute: 55g

Mass of solvent: 65g

Mol = Mass / molar mass

55 g / 84.06 g/mol = 0.654 moles of C₄H₄S

65 g /123 g/mol = 0.529 moles of C₂H₃BrO

Total moles = 0.654 + 0.529 = 1.183 moles

Mole fraction of thiophene = Moles of tiophene / Total moles

0.654 / 1.183 = 0.55

4 0

3 years ago

when 1.570 grams of the compound is vaporizedar 300 degrees celius and 1 atmosphere, the gas occupies a volume of 577 milliliter

Archy [21]

Answer:

128 g/mol

Explanation:

The molar mass is how much a mol of the substance weight.

In this question the weight is given (1.570 g).

To find the number of moles in the sample, we use the ideal gas law: PV=RnT

P= 1atm

V= 577mL= 0.577L

R (universal gas constant)= 0.08206( $\frac{atm*L}{mol*K}$ )

n= number of moles

T= 300°C= 573.15K

Solving for n:

n= $\frac{1 atm*0.577L}{0.08206\frac{atm*L}{mol*K}*573.15}$ <em>k</em>

n=0.0123mol

Molar mass= $\frac{1.570g}{0.0123 mol}$

Molar mass=128 $\frac{g}{mol}$

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3 years ago

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Write a paragraph, citing examples from the text, to explain how Dr.

grigory [225]

Paul J. Chirik developed methods associated with chemistry catalysis and transition metals, which may result useful for the development of manufacturing technologies.

<h3>What is catalysis?</h3>

Catalysis refers to the chemical processes that increase the rate of different types of reactions by lowering its activation energy.

Proteins (enzymes) are biological catalysts that increase the rate of chemical reactions in biological systems.

Catalysis may be reached by using transition metals (e.g., actinium and rutherfordium), which result useful in the development of manufacturing technologies.

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brainly.com/question/12507566

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2 years ago

6. List the different groups on the periodic table

Alex73 [517]

Answer:

Group 1: alkali metals, or lithium family.

Group 2: alkaline earth metals, or beryllium family.

Group 3: the scandium family.

Group 4: the titanium family.

Group 5: the vanadium family.

Group 6: the chromium family.

Explanation:

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3 years ago

What do gamma rays consists of?

kenny6666 [7]

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We know that Gamma rays consist of pure energy because, during Gamma decay, the atomic and mass numbers remain unchanged. Therefore, only energy is emitted.

Gamma rays are weakly ionising, however, they are strongly penetrating and thick concrete or a few centimetres of aluminium is needed to stop them.

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4 years ago

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