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3 years ago

What is the relationship between the concentration of the hydronium and hydroxide ion and pH in any water solution?

Chemistry

1 answer:

frez [133]3 years ago

4 0

Answer:

The concentration of hydronium ions and the pH value is related by the equation: pH=-Log[H+]

Explanation:

We have two different concepts pH and concentration of hydronium ions. Lets start with the hydronium ion.

An hydronium ion is a species that is produced by an acid:

$HA~->~H^+~+~A^-$

Aditionally, we can have the production of hydroxide ions. The subtances that have the capacity to produce this ions are called "bases":

$BOH~->~B^+~+~OH^-$

Now we can continue "pH"

The pH is a scale that indicates if the substance is and acid (higher concentration of $H^+$ ), neutral (equal amounts of $H+$ and $OH^-$ ) or basic (higher amount of $OH^-$ ).

Finally, the "pH" is calculated with the concentration of the hydronium ions (

$H^+$ ), the letter "p" is "-Log", therefore:

$pH=-Log[H^+]
$

I hope it helps!

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3 years ago

Which of the changes gas to solid gas to liquid, liquid to solid liquid to gas,solid to liquid solid to gas will involve an outp

Verdich [7]

Answer:

Liquid to solid liquid to gas

Explanation:

Boiling a liquid result in a gas

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2 years ago

How much energy (in Joules) is required to convert 129 grams of ice at −23.0 °C to liquid water at 18.0 °C?

Karo-lina-s [1.5K]

Answer:

The energy that is required for the process is:

6230.7 J + 42957 J + 9715.2 J = 58902.9 joules

Explanation:

This is a calorimetry problem:

Q = m . C . ΔT

Q = heat; m = mas; C is the specific heat and

ΔT = Final T° - Initial T°

Q = C lat . m

Q = Heat

m = mass

C lar = Latent heat of fusion

First of all we calculate the heat for ice, before it takes the melting point. (from -23°C to 0°C)

Q = 129 g . 2.10 J/g°C . (0°C - (-23°C)

Q = 129 g . 2.10 J/g°C . 23°C → 6230.7 joules

Then, the ice has melted. To be melted and change the state it required:

Q = C lat . m

Q = 333 J/°C . 129 g → 42957 joules

And in the end, we have water that changed its T° from O°C to 18°C

Q = 129 g . 4.184 J/g °C . (18°C - 0°C)

Q = 9715.2 Joules

The energy that is required for the process is:

6230.7 J + 42957 J + 9715.2 J = 58902.9 joules

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3 years ago

An unknown liquid is composed of 34.31% c, 5.28% h, and 60.41% i. The molecular weight is 210.06 amu. What is the molecular form

ozzi

In an unknown liquid, the percentage composition with respect to carbon, hydrogen and iodine is 34.31%, 5.28% and 60.41% respectively.

Let the mass of liquid be 100 g thus, mass of carbon, hydrogen and oxygen will be 34.31 g, 5.28 g and 60.41 g respectively.

To calculate molecular formula of compound, convert mass into number of moles as follows:

$n=\frac{m}{M}$

Molar mass of carbon, hydrogen and iodine is 12 g/mol, 1 g/mol and 126.90 g/mol.

Taking the ratio:

$C:H:I=n_{C}:n_{H}:n_{I}$

Putting the values,

$C:H:I=\frac{34.31 g}{12 g/mol}:\frac{5.28 g}{1 g/mol}:\frac{60.41 g}{126.90 g/mol}=6:11:1$

Thus, molecular formula of compound will be $C_{6}H_{11}I$ .

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3 years ago

What do you think would happen to a rock after billion years?

ANEK [815]

Answer:

Explanation:

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3 years ago