A different brand of iron tablet was analysed by Hitration with 0.0093 mol.L" potassium
dichromate via the reaction listed below;
Cr2O72- + 6Fe2+ + 14H+ + 2Cr3+ + 6Fe3+ + 7H20
In this experiment 4 tablets were crushed and dissolved in 200 cm3 of dilute acid. 25cm3
of this solution was used in the titration. The results of the titrations were as follows;
Titration Volume dichromate (cm)
1
33.0
2
32.05
3
32.15
4
32.10
Calculate the concentration of iron used in the titration (4 dp).
C1V1/C2V2 = n/n2

A Different Brand Of Iron Tablet Was Analysed By Hitration With 0.0093 Mol.L" Potassiumdichromate Via

Answers

Answer 1

The concentration of iron used in the titration : 0.009 M

Further explanation

Given

Reaction

Cr₂O₇²⁻ + 6Fe²⁺ + 14H⁺ ⇒ 2Cr³⁺ + 6Fe³⁺ + 7H₂O

0.0093 mol/L potassium  dichromate

200 cm³ of dilute acid, 25cm³   was used in the titration.

Required

the concentration of iron

Solution

Titration formula

C₁V₁n₁=C₂V₂n₂⇒ From equation : n₁=6n₂(1=Cr₂O₇, 2=Fe)

titration average : 33+32.05+32.15+32.1 / 4 = 32.325 cm³(ml)

25 cm³ of iron solution used in titration :

[tex]\tt V_1=32.325~ml\\\\V_2=25~ml\\\\C_1=0.0093~M\\\\\\\\C_1.V_1.n_2=C_2.V_2.n_1\\\\0.0093\times 32.325\times 6=C_2\times 25\times 1\\\\C_2=0.07215~M[/tex]

Dilution(25 ml from 200 ml iron solution)

[tex]\tt C_2.V_2=C_1.V_1\\\\0.007215\times 25=C_1\times 200\\\\C_1=0.009~M[/tex]


Related Questions

what is stastical thermodaynamics deal?

Answers

Explanation:

Statistical thermodynamics is a theory that uses molecular properties to predict the behavior of macroscopic quantities of compounds. ... From these energy-level data, a temperature-dependent quantity called the partition function can be calculated.

Answer:

the stastical thermodaynamics deal is essentially a theory that you can use the molecules and their properties in order to predict how the molecule will behave in a macroscopic quantities of compounds. Using this, you can also tell a temperature-dependent quantity called the partition function.

(I also didn't copy and paste this, so it's safe for you to use)

May I have brainliest please? :)

dipole dipole bonds are covalent bond?​

Answers

Answer:

The polar covalent bond is much stronger in strength than the dipole-dipole interaction. The former is termed an intramolecular attraction while the latter is termed an intermolecular attraction. So now we can define the two forces: Intramolecular forces are the forces that hold atoms together within a molecule.

Explanation:

I have some things to point out:

#1: There is no such thing as "Dipole-dipole bonds", only Dipole-dipole interactions between molecules that share an unequal balance of electrons between their atoms.

#2: Intermolecular forces of attraction such as Dipole-dipole interactions are not considered as covalent bonds. Covalent bonds are rigid and are considered intramolecular forces of attraction (found within the molecule instead of between)

Hope I have helped you! Many thanks.

Find the volume of
this object.
5 cm
5 cm
5 cm
A
15 cm3
B
125 cm3
C
30 cm3

Answers

Answer:  B. [tex]125\ cm^3[/tex].

The volume of the given object = [tex]125\ cm^3[/tex]

Explanation:

Given : Dimensions of an object : 5 cm x 5 cm  x 5 cm [ it is a cube with all equal sides]

Formula to find the volume of a cube = [tex](side)^3[/tex]

[tex]=5^3\ cm^3=125\ cm^3[/tex]

Hence, the volume of the given object = [tex]125\ cm^3[/tex]

Therefore , the correct option is B. [tex]125\ cm^3[/tex].

which event would most likely lead to a thunderstorm HELP GIVING BRAINLIEST

Answers

Warm moist air jaisjsisksusjisjud

Answer:

A

Explanation:

i got right

How many grams are in 2.3 x 1024 formula units of KNO3?

Answers

Answer:

390 g KNO₃

General Formulas and Concepts:Chemistry

Atomic Structure

Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:

Step 1: Define

2.3 × 10²⁴ formula units KNO₃

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of K - 39.10 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g.mol

Molar Mass of KNO₃ - 39.10 + 14.01 + 3(16.00) = 101.11 g/mol

Step 3: Convert

[tex]2.3 \cdot 10^{24} \ formula \ units \ KNO_3(\frac{1 \ mol \ KNO_3}{6.022 \cdot 10^{23} \ formula \ units \ KNO_3} )(\frac{101.11 \ g \ KNO_3}{1 \ mol \ KNO_3} )[/tex] = 386.172 g KNO₃

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

386.172 g KNO₃ ≈ 390 g KNO₃

What is another name for acetic acid? *
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2 .vinegar
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Answers

It’s not b because vinegar is no less than 4%. Most likely it’s C but I’m not sure if you do choose C let me know if I’m wrong or right. Good luck !

How is continental crust different from oceanic crust?


A: Oceanic crust is thicker and more dense.


B: Oceanic crust is thinner and more likely to sink.


C: Continental crust is thicker and more likely to sink.


D: Continental crust is more dense and lighter.

Answers

Answer:

b

Explanation:

google lol ur welcome

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D Excretory systems regulate the chemical composition of body fluids by removing metabolic wastes and retaining the proper amounts of water, salts, and nutrients. Components of this system in vertebrates include the kidneys, liver, lungs, and skin.

how dose dissolving sugar in water show that matter is made up of particles

Answers

Answer:

When sugar dissolves, the sugar particles separate from each other and mix with the water particles. When the sugar particles separate, the smaller water particles fit into the spaces between the larger sugar particles. The water and sugar particles are attracted to each other, so they move closer together when they mix.

Explanation:

:  )

Will give brainliest

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I will help you with answering this question.

What is generally true of atoms with relatively large atomic radii?

Answers

Answer:

Large atoms hold their electrons very tightly. ... Large atoms tend to be found on the right side of their period on the periodic table.

Explanation:

Answer:

Explanation:

Large atoms tend to have a low ionization energy and a low electron affinity.

How many grams of NaCl are needed to make 300ml of a 2% solution

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Answer:

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What is 797 mm hg to atm?

Answers

Answer:

797 mm hg = 1.04868 atm

Explanation:

1 atm = 760 mm hg

797 mm hg to atm is 1.0468 atm

Pressure is defined as the physical force exerted on an object. The force applied is perpendicular to the surface of objects per unit area.

There are many different types of units and prefixes that may be used in general practice to reflect pressure. Thus, it is ensured that all the measurements and their respective units are in the same framework when conducting pressure calculations.

Pascal is the SI unit of pressure, and is the basic pressure unit in the SI (the International System of Units) system.

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Answers

Answer: is that a question or

Explanation:

Answer:

its c

Explanation:

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Answers

Answer:

Temperature

Explanation:

Because Temperature is a measure of the average kinetic energy of all the molecules in a gas. As the temperature and, therefore, kinetic energy, of a gas changes, the RMS speed of the gas molecules also changes. The RMS speed of the molecules is the square root of the average of each individual velocity squared.

Will give brainliest

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Answer:

c. both gases have the same number of molecules

brainliest?

Write out the electron configurations of the ions below and determine which one is listed with an incorrect charge. (the numbers and charges written after the elemental symbol should be understood as superscripts)
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Answers

Answer:

I think B. O2+

Explanation:

Answer:

B

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Answers

Answer:

Newton discovered it.

Explanation:

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Answer:

gravity is a force that pulls things towards each other

Explanation:

issac newton is the one who discovered it

Please help, it’s much appreciated



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Answers

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Answer:

3.77 x 10^-13 M

Explanation:

Which is one advantage of using a reflecting telescope instead of a refracting telescope?

Reflecting telescopes are less expensive.
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Answers

Answer:

Reflecting telescopes take up less space, is the suitable answer.

Answer:

B, or 2: Reflecting telescopes produce clearer images.

Explanation:

Took the test

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Answers

The dilution factor : 100

Further explanation

The dilution factor(DF) : ratio of concentration of stock solution and diluted solution or ratio of the volume of final solution to the initial volume from stock solution

From equation of dilution :

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Where did most of the heat of the Earth come from at its formation?
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1 pts

Answers

Answer:

radioactive decay

Explanation:

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Answers

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Explanation:

In a molecule of calcium sulfide, calcium has two valence electron bonds, and a sulfur atom has six valence electrons. How many lone pairs of electrons are present in the Lewis structure of calcium sulfide?
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Answers

Answer:

E.none

Explanation:

because the bonds join with each other and no lone pair is left

ASAP PLZ HELP I WILL MARK BRAINLIEST Based on the diagram, what can you conclude about the pole of the magnet? O It is a south pole because the field lines spread out from this end. O It is a north pole because the field lines spread out from this end, O It is a south pole because the field lines enter the magnet at this end. O It is a north pole because the field lines enter the magnet at this end.​

Answers

Answer:C

Explanation:I took the test

Answer:

It is a south pole because the field lines enter the magnet at this end.

Explanation:

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CH3CH2CH2CH2F
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Answers

Answer:

The correct answer is (C)

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Explanation:

Hope this helped if so please leave a "Rating" and "Like" and MARK me Brainliest if it was the BEST answer! THANKS! :)

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Answer:

True. All metals have a melting point when it reaches a certain degree of temperature

Explanation:

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