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
JulsSmile [24]
3 years ago
13

PLEASE HELP! I'll mark brainliest!

Chemistry
2 answers:
OLEGan [10]3 years ago
7 0
Acidic and basic are two extremes that describe chemicals, just like hot and cold are two extremes that describe temperature. Mixing acids and bases can cancel out their extreme effects, much like mixing hot and cold water can even out the water temperature. A substance that is neither acidic nor basic is neutral. 
The character of acidic, basic and neutral is defined by the concentration of hydrogen ions [H+](mol/L). A solution with a concentration of hydrogen ions higher than 10-7mol/L is acidic, and a solution with a lower concentration is alkaline (another way to say basic). Using the formula, pH=-log[H+], a pH of 7 is neutral, a pH less than 7 is acidic, and a pH greater than 7 is basic. As one can see from this formula, ten times a given concentration of hydrogen ions means one unit lower in terms of pH value (higher acidity), and vice versa. 
The formula for ph is given by:pH=−log10[H+]

What is the concentration of H+ ions at a pH = 8?

In calculating for the concentration of hydrogen ion, the formula is given by:[H+]=(10)^(-pH)
Solution:
[H+]=(10)^(-8)[H+]=0.00000001 mol/L

What is the concentration of OH– ions at a pH = 8?pH+pOH=148+pOH=14pOH=6
[OH-]=(10)^(-pOH)[OH-]=(10)^(-6)[OH-]=0.000001
What is the ratio of H+ ions to OH– ions at a pH = 2?The ratio is 0.00000001:0.000001 which is equal to 0.01
siniylev [52]3 years ago
5 0

Answer:

0.00000001

0.000001

0.000001 : 1 or 1 : 100

Explanation:

answer on e2020

You might be interested in
How would you compare a health care system in Ancient Egypt and a interdisciplinary health care team?
dezoksy [38]

Answer:

A

Explanation:

7 0
3 years ago
A good team member will actively listen, which means they will ______.
Wittaler [7]
B is the answer I think better sure
8 0
3 years ago
Read 2 more answers
A hydrocarbon sample was burned in a bomb calorimeter. The temperature of the calorimeter and the 1.00 kg of water rose from 20.
fomenos

Answer:

The heat released by the combustion is 20,47 kJ

Explanation:

Bomb calorimeter is an instrument used to measure the heat of a reaction. The formula is:

Q = C×m×ΔT + Cc×ΔT

Where:

Q is the heat released

C is specific heat of water (4,186kJ/kg°C)

m is mass of water (1,00kg)

ΔT is temperature change (23,65°C - 20,45°C)

And Cc is heat capacity of the calorimeter (2,21kJ/°C)

Replacing these values the heat released by the combustion is:

<em>Q = 20,47 kJ</em>

6 0
3 years ago
What makes physical change a physical change and a chemical change a chemical change
Snowcat [4.5K]
A physical change is any change in a substances form that does not change its chemical makeup. Examples of physical changes are breaking a stick or melting ice. A chemical change occurs when atoms of a substance are rearranged, and the bonds between the atoms are broken or formed. HOPE THIS HELPS!!
6 0
2 years ago
Read 2 more answers
A volcano violently erupts near a small town and wildlife preserve. Which effect might occur? Some local species develop new ada
NemiM [27]

Answer:

Ash and dust fill the air and reduce sunlight.

Explanation:

Ash and dust comes out of volcanoes, and it is bad for the environment. Polluting the air and causing fogginess, it also reduces sunlight.

3 0
3 years ago
Read 2 more answers
Other questions:
  • If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the struct
    14·1 answer
  • Do two objects with the same mass always have the same volume
    15·1 answer
  • How does it’s atomic radius compare to chlorine’s?
    10·1 answer
  • Which of the following do you think use plasma?
    15·2 answers
  • Which of the following describes the sharing of a nonbonding electron pair on a nitrogen molecule with an oxygen atom, resulting
    5·1 answer
  • Currently proven global reserves are expected to be largely exhausted within the next 50 years. Uranium-238 A Coal B Natural gas
    14·1 answer
  • Dylan is completing an experiment in science class. The teacher gave Dylan a raw egg that had the shell removed. The egg is suro
    6·1 answer
  • 1. For each of the following formulas:
    6·1 answer
  • Can someone help me with this
    14·1 answer
  • Use the drop-down menus to complete each statement.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!