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2 years ago

What is the hydrogen ion concentration, [H+], of a solution with a pH of 5.43?

Chemistry

1 answer:

grigory [225]2 years ago

6 0

Answer: 3.7 x10−6 Mole per dm^3

Explanation:

pH is the negative logarithm of hydrogen ion concentration in a solution.

So, pH = - log(H+)

Since the solution has a pH of 5.43

5.43 = -log(H+)

To get hydrogen ion concentration, find the Antilog of 5.43

(H+) = Antilog (-5.43)

(H+) = 0.000003715

Then, 0.000003715 in standard form becomes 3.7 x10−6 M

Thus, the concentration of hydrogen ion in the solution is 3.7 x10−6 Mole per dm^3

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can anyone explain to me how to balance a chemical equation? im having trouble in understanding how i keep getting it wrong.

Virty [35]

For example we are going to use this unbalanced chemical reaction:
H₂ + O₂ → H₂O.
First, calculate number of atoms (hydrogens and oxygens) on left and right. There is two oxygen and two hydrogen on left and two hydrogen and one oxygen on right.
You can not change molecular formula of compound, only you can put coefficient in fron of compound to balance reaction.
Put 2 in front water to balance oxygen (now you have two oxygens on left and right). But now you have four hydrogens on right, so you must put 2 in fron hydrogen on the left.
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3 years ago

Read 2 more answers

Determine whether each of the following statements about sulfur oxide and/or nitrogen oxide pollution is true or false.

astraxan [27]

Answer:

a) False

b) False

c) True

Explanation:

a) Most sulfur oxides formed during combustion come from sulfur in the air: The sulfur burns in presence of oxygen to produce sulfur oxides, the source of sulfur is anthropogenic activities (Human activities).

So the given statement is false.

b) A flue gas scrubber removes SO2 pollution in a coal-fired power plant by using lime to convert the SO2 into alcohols:

False

The lime reacts with sulfur dioxide to give carbon dioxide and calcium sulfite.

$CaCO_{3}+SO_{2}--->CaSO_{3}+CO_{2}$

c) True

3 0

2 years ago

A) if each substance above is heated at the same rate and same mass, which of the above has a smaller specific heat? how do you

aliya0001 [1]

Answer:

I think B would be alcohol but A I'm not to sure

5 0

3 years ago

The number of covalent bonds that an atom can make is determined by

diamong [38]

The number of covalent bonds that an atom can make is determined by the no. of electrons needed to form a duplet or octet of electron by each of the atom.

5 0

3 years ago

In another process in which 235 92U undergoes neutron bombardment, the following reaction occurs: 235 92U+10n→AZSr+143 54Xe+310n

Dmitrij [34]

Answer:

$_{38}^{90}\textrm{Sr}$

Mass defect of the oxygen nucleus is:- 0.1370 amu

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

For the given fission reaction:

$^{235}_{92}\textrm{U}+^1_0\textrm{n}\rightarrow ^A_Z\textrm{Sr}+^{143}_{54}\textrm{Xe}+3^1_0\textrm{n}$

To calculate A:

Total mass on reactant side = total mass on product side

235 + 1 = A + 143 + 3

A = 90

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

92 + 0 = Z + 54 + 0

Z = 38

<u>Hence, the isotopic symbol of strontium is:- $_{38}^{90}\textrm{Sr}$ </u>

The element given is:- $_{8}^{16}\textrm{O}$

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of O = 8

Thus, the number of protons = 8

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

16 = 8 + Number of neutrons

Number of neutrons = 8

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (8*1.007825 + 8*1.008665) amu = 16.13192 amu

Given, mass of the atom = 15.994914 amu

Mass defect = Δm = |16.13192 - 15.994914| amu = 0.137006 amu

<u>Mass defect of the oxygen nucleus is:- 0.1370 amu</u>

4 0

2 years ago