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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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Express 975,000 in scientific notation

kodGreya [7K]

9.75 x 10^5

A number in scientific notation has the form <em>a x 10^b</em> where

• a is the <em>coefficient</em>

• b is the <em>exponent</em>

Here are the steps to convert a number greater than 1 to scientific notation.

a) Find the coefficient

Put the decimal point after the first digit and drop the trailing zeroes

<u>9.75</u> 000

The coefficient is 9.75 .

b) Find the exponent

Count the number of digits after the first digit.

In 975 000 there are five digits after the 9. Therefore, the exponent is 5.

c) Write the number

We write 975 000 as 9.75 x 10^5.

5 0

4 years ago

For the reaction CH4(g) + 2O2(g)CO2(g) + 2H2O(g) H° = -802 kJ and S° = -5.20 J/K At standard conditions, this reaction would be

Illusion [34]

Answer: at relatively low temperatures.

Explanation:

According to Gibbs equation;

$\Delta G=\Delta H-T\Delta S$

$\Delta G$ = Gibb's free energy change

$\Delta H$ = enthalpy change

T = temperature

$\Delta S$ = entropy change

A reaction is spontaneous when $\Delta G$ = Gibb's free energy change is negative.

Thus $\Delta G=(-\Delta H)-T(-\Delta S)$

$\Delta G=-(\Delta H)+T(\Delta S)$

Thus the reaction is spontaneous or $\Delta G$ is negative only when $T(\Delta S)$

Thus the reaction is spontaneous at relatively low temperatures

7 0

3 years ago

A liquid dietary supplement is packaged in 10-ml dropper containers to deliver 2000 international units of vitamin d3 in each dr

RoseWind [281]

Answer : 37 drops are delivered per milliliter of the solution.

Explanation :

The problem gives us lot of extra information.

We want to find the number of drops delivered in 1 milliliter here.

We have been given that, one drop of the solution delivers 0.027 mL of solution.

Let us use this as a conversion factor, $\frac{1 drop}{0.027 mL}$

Let us find number of drops in 1 mL using this conversion factor.

$1 mL \times \frac{1 drop}{0.027mL} = 37.0 drops$

Therefore we can say that 37 drops are delivered per milliliter of the solution.

7 0

4 years ago

What might happen when a gas is exposed to a small flame?

Verizon [17]

Answer:

The fire may grow bigger, depending on the gas.

Explanation:

If you expose more air to a small flame then it could grow larger because air keeps fire alive.

3 0

3 years ago

Zachary is tasked with carefully measuring precisely one mole of aluminum. How should Zachary go about completing this assignmen

Advocard [28]

27g of Aluminium

Explanation:

For Zachary tasked with obtaining one mole of aluminium, weighing 27g of the compound gives 1 mole of the element.

A mole is a simple unit of quantifying particles of a substance.

It is the amount of substance that contains the avogadro's number of particles.

The molar mass of a substance is the mass in gram of one mole of a substance.

The molar mass of Aluminium is 27g/mol

This is implies 1 mole aluminium has a mass of 27g.

Mass = number of moles x molar mass = 1 mole x 27g/mole = 27g

learn more:

Molar mass brainly.com/question/2861244

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6 0

3 years ago