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ratelena [41]
3 years ago
5

An HCl solution has a concentration of 9.8 x 10-5 M. What is the pH of this solution

Chemistry
2 answers:
Vilka [71]3 years ago
8 0
C=9.8*10⁻⁵

pH=-lg[H⁺]

HCl = H⁺ + Cl⁻

[H⁺]=c

pH=-lg(9.8*10⁻⁵)=4.0

pH=4.0
Svetach [21]3 years ago
6 0

Answer:

pH of the given HCl solution is 4.0

Explanation:

<u>Given:</u>

Concentration of HCl solution = 9.8*10⁻⁵ M

<u>To determine:</u>

The pH of the solution

<u>Explanation:</u>

pH of a solution refers to the concentration of H+ ions which in turn reflects the acidity of the solution

pH is related to the H+ concentration as follows:

pH = -log[H+} \\\\For\ the \ given\ HCl\ solution\\\\pH = -log(9.8*10^{-5}) = 4.00

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Li + HNO3 &gt; LiNO3 + H2 how do I balance it? Show work pls
azamat

Answer: The balanced equation is 2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}.

Explanation:

The given reaction equation is as follows.

Li + HNO_{3} \rightarrow LiNO_{3} + H_{2}

Number of atoms present on reactant side are as follows.

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  • H = 1
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Number of atoms present on product side are as follows.

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To balance this equation, multiply Li by 2 and HNO_{3} by 2 on reactant side. Also, multiply LiNO_{3} by 2 on product side.

Hence, the equation can be rewritten as follows.

2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}

Now, number of atoms present on reactant side are as follows.

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  • H = 2
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Number of atoms present on product side are as follows.

  • Li = 2
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As there are same number of atoms on both reactant and product side. Hence, the equation is now balanced.

Thus, we can conclude that the balanced equation is 2Li + 2HNO_{3} \rightarrow 2LiNO_{3} + H_{2}.

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The equation is given is of combustion of ethanol.

Fuel ethanol (C2H5OH) has high energy carbon-carbon (C-C) and carbon-hydrogen (C-H) bonds that store chemical energy. From the ethanol container, ethanol molecules evaporating, enter the flame's base. A physical action called evaporation converts liquid into gas. Ethanol evaporates with a constant molecular structure.

The molecules of ethanol and oxygen combine inside the flame and undergo a chemical transformation. Let's consider matter, or the atoms. The oxygen (O2) and ethanol (C2H5OH) molecules' atoms reorganise into carbon dioxide (CO2) and water (H2O). There are always the same number of atoms. A chemical equation may be used to demonstrate how the atoms are rearranged.

Energy is released as the atoms in the oxygen and ethanol are rearranged. When the high-energy C-C and C-H bonds in ethanol are swapped out for the low-energy H-O and C=O bonds in carbon dioxide and water, chemical energy is released as heat and light.

The ethanol and oxygen atoms are rearranged into carbon dioxide and water during burning. Water and carbon dioxide escape from the flame's top.

To conclude with we can say that the given reaction of combustion of ethanol. Ethanol with oxygen given carbon dioxide with water on reaction.

Learn more about Combustion of ethanol here:

brainly.com/question/14007764

#SPJ10

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