1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alexira [117]
3 years ago
5

At 25 °C, what is the hydroxide ion concentration, [ OH â ] , in an aqueous solution with a hydrogen ion concentration of [ H +

] = 5.0 Ã 10 ^â 4 M?
Chemistry
1 answer:
umka2103 [35]3 years ago
7 0

Answer:

[OH⁻] = 2.0 × 10⁻¹¹ M

Explanation:

Given data

  • Temperature: 25°C
  • Concentration of hydrogen ion ([H⁺]): 5.0 × 10⁻⁴ M
  • Concentration of hydroxide ion ([OH⁻]): ?

We can calculate the concentration of hydroxide ion using the following expression.

[H⁺].[OH⁻] = Kw

where,

Kw is the ionic product of water (Kw = 1.0 × 10⁻¹⁴ at 25°C)

[H⁺].[OH⁻] = Kw

[OH⁻] = Kw/[H⁺]

[OH⁻] = 1.0 × 10⁻¹⁴/5.0 × 10⁻⁴

[OH⁻] = 2.0 × 10⁻¹¹ M

You might be interested in
In the lab, you are given a metal ball. You measure the mass of the ball to be 28 g. You place the ball in a graduated cylinder
KIM [24]

Answer:

Density = 8.75ml

Explanation:

Density = Mass / Volume

In this problem ...

Mass = 28 grams

Volume = 31.4ml - 28.2ml = 32ml (water displacement also)

∴Density = mass /volume = 28g/32ml = 8.75g/ml

8 0
2 years ago
Consider the reactionI2(g) + Cl2(g)2ICl(g)Using standard thermodynamic data at 298K, calculate the entropy change for the surrou
Georgia [21]

We know,

\Delta H_{I_2(g)}=62.438\ KJ/mol\\\\\Delta H_{Cl_2(g)}= 0.0\ KJ/mol\\\\\Delta H_{ICl(g)}=17.78\ KJ/mol

For given reaction, I_2(g)+Cl_2(g)\ -->\ 2ICl(g)

\Delta H_{rxn}=2\Delta H_{ICl(g)}-\Delta H_{I_2(g)}-\Delta H_{Cl_2(g)}\\\\\Delta H_{rxn}=2(17.78)-0-62.438\ KJ/mol\\\\\Delta H_{rxn}=-26.878\ KJ/mol

For , 2.41 moles of I_2 :

\Delta H_{rxn}=2.41\times (-26.878)\ KJ\\\\\Delta H_{rxn}=-64.78\ KJ

We know :

\Delta S = -\dfrac{\Delta H_{rxn}}{T}\\\\\Delta S = -\dfrac{-64.78}{298}\ KJ/K\\\\\Delta S =-0.21738 \ KJ/K\\\\\Delta S=-217.38\ J/K

Hence, this is the required solution.

7 0
3 years ago
assume that a water balloon has the same number of water molecules as a helium balloon has helium atoms. If the mass of the wate
Aloiza [94]

Answer : The mass of the water molecule is 4.5 times greater than the mass of the helium atom.

Explanation :

Assumption : The number of water molecules is equal to the number of helium atoms

Given : The mass of water = 4.5 × The mass of helium     ........(1)

The mass of Water = Mass of 1 water molecule × Number of water molecule

The mass of Helium = Mass of 1 helium atom × Number of helium atom

Now these two masses expression put in the equation (1), we get

Mass of 1 water molecule × Number of water molecule = 4.5 × Mass of 1 helium atom × Number of helium atom

As per assumption, the number of water molecules is equal to the number of helium atoms. The relation between the mass of water molecule and the mass of helium atom is,

Mass of water molecule = 4.5 × Mass of helium atom

Therefore, the mass of the water molecule is 4.5 times greater than the mass of the helium atom.

3 0
3 years ago
Which of the following methods would be the best method for separating oil from water?
vazorg [7]
Oil and water can separate by utilizing a separating funnel, oil and water are totally insoluble in one another. The water structures lower while the oil forms the upper layer.
8 0
2 years ago
__Mg + __Fe2O3 -> __MgO + __Fe
Anika [276]

Answer:

Your correct answer is A. 1,2,1,2

Explanation:

Please mark brainliest!

7 0
3 years ago
Other questions:
  • You are cooking beans over a campfire. By the light of the fire, you read that one serving of beans is 120 calories. After eatin
    5·1 answer
  • What's the correct formula for surfer hexaflouride
    10·1 answer
  • In a certain crystalline material the vacancy concentration at 25 c is one-fourth that at 80
    15·1 answer
  • How many moles are there in 45.0 grams of sulfuric acid,<br> H2SO4?
    12·1 answer
  • Identify each type of titration curve. note that the analyte is stated first, followed by the titrant.
    14·1 answer
  • What is the definition of Indirect Proportion Graph?
    6·2 answers
  • What is the name of the functional group that is attached to this hydrocarbon?
    5·1 answer
  • The pH of an acidic solution is 2.47. what is the [H+]
    15·1 answer
  • Fill in the coefficients that will balance the following reaction:
    9·1 answer
  • Is using matches to light a candle physical or chemical change ?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!