Chemistry High School

what does buffer do?? (Chemistry)​

What Does Buffer Do?? (Chemistry)

Answers

Answer 1
A buffer is a solution that can resist pH change upon the addition of an acidic or basic components. It is able to neutralize small amounts of added acid or base, thus maintaining the pH of the solution relatively stable. This is important for processes and/or reactions which require specific and stable pH ranges. Buffer solutions have a working pH range and capacity which dictate how much acid/base can be neutralized before pH changes, and the amount by which it will change.
Answer 2

Answer:

C, It resists a change in pH when H+ or OH is added to a solution.

Explanation:

a p e x

Related Questions

which element in the alkali group will have the lowest first ionization energy?

Answers

Fluorine

Explanation:

F- has the lowest ionisation energy

what polyatomic ion could form a neutral compund with the manganese

Answers

Answer:

The polyatomic cation that will react with MnO₄⁻ to form a neutral compound is NH₄⁺ (ammonium ion) to form NH₄MnO₄ (Ammonium permanganate).

Changes in which two characteristics can indicate a physical change?
A. Shape
B. Reactivity
O C. State
D. Flammability

Answers

Changes in shape and state are the two characteristics  which indicate a physical change.

What are physical changes?

Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.

Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.

They involve only rearrangement of atoms and are often characterized to be changes which are reversible.

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The correct name for the molecule 14Cl7 is:
a. triiodide heptachloride
b. lodine chloride
c. tetraiodine heptachloride
d. quadiodine septachloride

Answers

I believe the answer is C, but please correct me if I’m wrong.

Why is it important for scientists to replicate each other’s experiments?

Answers

Getting the same result when an experiment is repeated is called replication. ... Replication is important in science so scientists can “check their work.” The result of an investigation is not likely to be well accepted unless the investigation is repeated many times and the same result is always obtained.

All mutations _____.

Answers

could u provide more like on what to answer this so confusing

Given the following equation:
2KMnO4 → K2MnO4 + MnO2 + O2
How many grams of KMnO4 are required to produce
1.60 grams of O2?
g

Answers

Mass of KMnO4 required : 31.607 g

Further explanation

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

2KMnO₄ → K₂MnO₄ + MnO₂ + O₂

mol of O₂ :

[tex]\tt \dfrac{1.6}{16}=0.1[/tex]

mol ratio KMnO₄ : O₂ = 2 : 1

mol of KMnO₄ :

[tex]\tt \dfrac{2}{1}\times 0.1=0.2[/tex]

mass of KMnO₄ :

MW KMnO₄ : 158,034 g/mol

[tex]\tt mass=0.2\times 158,034 =31.607~g[/tex]

The ___ blends into outer space.
Select one:
O a. troposphere
O b. stratosphere
O c. mesosphere
O d. exosphere

Answers

Answer:

Exosphere

Explanation:

it is found at the end reaching outer space

What is differentiation

Answers

Answer:

The Definition of Differentiation

The derivative is the instantaneous rate of change of a function with respect to one of its variables. This is equivalent to finding the slope of the tangent line to the function at a point

Explanation:

Which statement describes the blood type of a person with the alleles IAi?

It is type AB because I and i are codominant.
It is type AB because A and i are codominant.
It is type A because i is dominant and A is recessive.
It is type A because A is dominant and i is recessive.

Answers

Answer:

b

Explanation:

Answer:

The answer is B

Explanation:

A sector of a circle has an area of 132m². if the angle of the sector is 105,°,calculate the radius of the circle
​

Answers

Answer: 12

see the step by step below:

what happens to neutral sodium atoms when it reacts with the fluorine atom?

Answers

Answer:

losses a single valence electron to the fluorine atom, which has just enough space to accept it.

- Lumen Learning

ROY G BIV arranges the colors of the rainbow *
In order of increasing energy
In order of increasing wavelength.
O In order of decreasing frequency.

Answers

Answer:

Wavelengths..

Explanation:

The colors we see always go from red, which is least refracted, through orange, yellow, green, blue, indigo and violet -- Roy G Biv. The blue, indigo and violet wavelengths are refracted the most as sunlight passes through raindrops.

A quantity of gas under a pressure of 302kpa has a volume of 600cm3. The pressure is increased to 604kPa, while the temperature is kept constant. What is the new volume?

Answers

Answer:

V₂ = 300  cm³

Explanation:

Given data:

Initial pressure = 302 KPa

Initial volume = 600 cm³

Final pressure = 604 KPa

Final volume = ?

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

302 KPa × 600 cm³ = 604 KPa× V₂

V₂ = 181200 KPa.cm³ / 604 KPa

V₂ = 300  cm³

Self-disclosure must be ____________.
a.
brief
b.
dishonest
c.
voluntary
d.
one-sided

Answers

Answer:a

Explanation:

Answer:

C

Explanation:

One must be willing to self disclose for them to self disclose.

HELP FAST PLEASE!!

Producers are able to produce more of a good and to make more profit from __________. A. high prices B. limited demands C. high production costs D. government involvement

Answers

Answer:

the answer is A

Explanation:

i took the test on edg.                  sorry it is so late:(

Answer:A

Explanation:

Simple chemistry question please help. Look at image.

Answers

It's the last one. They all have the same number of electrons in their outer ring. They're also called valence electrons.

Hope this helped!

i need help asap thank u

Answers

it is b, i learned this last year hope this helps

Which of the following mixtures will show Tyndall effect?
Starch in water, Tincture of iodine, air, fog, sodium chloride in water.

Answers

Answer:

Explanation:

Milk and starch solution are example of colloidal solution and we know that Tyndall effect is shown by colloids.

Why does citric acid make water cold?

Answers

The reaction between citric acid and water is endothermic.

There are two types of reactions based on whether heat is evolved or absorbed by a reaction. Those two types are:

Endothermic reaction - in this reaction, heat is absorbed thereby making the reaction vessel to feel cold. Exothermic reaction- in this type of reaction, heat is evolved thereby making the reaction vessel to feel warm.

The dissolution of citric acid in water is an endothermic reaction. The water feels cold because heat is absorbed from the surroundings as the reaction proceeds.

For a definition of endothermic and exothermic reactions see

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A glass of unsweetened lemonade has a mass of 255 grams. A spoonful of sugar is massed before stirring It Into the lemonade and you find that
It has a mass of 25 grams.
• How much mass will the sweetened lemonade have once you stir in the sugar?
• State and explain the science concept that leads you to this answer.

Answers

Answer:

270

Explanation:

Once you add more mass to something the mass doesn’t go away you add more mass.

hope this helps!

Directions: Record the number of each atom in each molecule, then record the total number of atoms in the molecule.

Answers

Total number of atoms = 5

Further explanation

The formula of a compound shows the composition of the constituent elements

CaCO₃ is composed of 3 types of atoms, namely Ca, C and O

The amounts of each of these atoms in the compound CaCO₃:

Ca = 1 C = 1 O = 3

Then total number of atoms :

[tex]\tt 1+1+3=5[/tex]

Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the treadmill and to lift weights. What do Kendrick's cells do during cellular respiration?


A.His cells convert kinetic energy into chemical energy.


B.His cells use oxygen to break down food molecules to release energy.


C.His cells absorb light energy through the chlorophyll in their chloroplasts.


D.His cells combine water and carbon dioxide to produce oxygen and glucose.

Answers

Answer:

i think it is B

Explanation:

His cells use oxygen to break down food molecules to release energy.

Which properties are most common in nonmetals

Answers

High ionization energies
High electronegativities
Poor thermal conductors
Poor electrical conductors
Brittle solids—not malleable or ductile
Little or no metallic luster
Gain electrons easily
Dull, not metallic-shiny, although they may be colorful
Lower melting points and boiling point than the metals

According to the electronic configuration, properties which are most common in non-metals are high ionization energies, high electronegativity and poor conductors of heat and electricity.

What is electronic configuration?

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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determine the mass of co2 prodeced by burning enough carbon to produce 5 x 10^2 kj

Answers

Answer:

= 55.7g

Explanation:

12g of carbon burnt to produce 5x10^2KJ

So, 5x10^2KJ(12g/393.5KJ)=15.2g

Then mas of CO2 is 44g

So, 15.2g(12g/44g)=57.7g


Kinetic Theory: Tutorial
Activity
In this activity, open the Gas Properties simulation and follow the instructions provided with the questions below.
Part A
Using the controls along the right side of the simulation, under "Options," check the second box to select the temperature of the new particles
Then move the slider at the bottom to its lowest setting (50 K). Next, choose temperature as your constant parameter at the top. In the "Gas in
Chamber" box, add "light species" particles until about 200 are in the box. Finally, quickly add about 20 "heavy species" particles to the box.
Carefully observe how they spread across the chamber through time. What do you think causes the heavy particles to spread throughout the
chamber? What can you say about the direction of their movement?

Answers

Answer:

The heavy particles move across the chamber because of the diffusion property of gas particles. The particles move in straight lines and change directions only when they collide with other molecules or the walls of the chamber.

Explanation:

What are the coefficients when the equation below is balanced?

Answers

Answer:

1, 2, 2, 1

Explanation:

This is basically the equation we're trying to balance:

Cu + AgNO₃ → Ag + Cu(NO₃)₂

We start with Copper (Cu): There is 1 atom on the reactants'(left) side and 1 atom on the products'(right) side which means it's balanced

The second is Silver (Ag): There is 1 atom on the reactants' side and 1 atom on the products' side which means it's balanced

The third is Nitrogen (N) and there is 1 atom on the reactants' side and 2 atoms on the products' side. We balance it by multiplying the reactants' side by 2

Cu + 2AgNO₃ → Ag + Cu(NO₃)₂

Silver is now imbalanced so we multiply the silver atoms on the product's side by 2

Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂

If you count them now, the atoms on each side are the same number

1 Copper atom on each side

2 Silver atoms on each side

2 Nitrogen atoms on each side

6 Oxygen atoms on each side (2 sets of 3 oxygen atoms)

1Cu + 2AgNO₃ → 2Ag + 1Cu(NO₃)₂

Question 17 of 25
Which of the following is the energy of motion?
A. Nuclear energy
B. Chemical potential energy
C. Kinetic energy
D. Gravitational potential energy
SUOMI

Answers

Answer:

c. kinetic energy

Explanation:

who discovered the electron as a particle?

Answers

Answer: Thomson

Explanation: During the 1880s and '90s scientists searched cathode rays for the carrier of the electrical properties in matter. Their work culminated in the discovery by English physicist J.J. Thomson of the electron in 1897.

Adaptations can only arise if
there is _______ within a species.

Answers

Answer:

Diversity?

Explanation:

Think thats bio

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