Answers
For the reaction of deprotonation of formic acid, the concentration of HCOO⁻ at equilibrium is 0.0151 M if the initial concentration of formic acid is 1.35 M.
The reaction of deprotonation of formic acid is the following:
CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺
At the equilibrium we have:
CHOOH + H₂O ⇄ HCOO⁻ + H₃O⁺ (1)
1.35 - x x x
The acid equilibrium constant for this reaction is:
[tex] K_{a} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = 1.7 \cdot 10^{-4} [/tex] (2)
Entering the values of [CHOOH] = 1.35-x, [HCOO⁻] = [H₃O⁺] = x, into equation (2) we have:
[tex] 1.7 \cdot 10^{-4} = \frac{[HCOO^{-}][H_{3}O^{+}]}{[CHOOH]} = \frac{x^{2}}{(1.35 - x)} [/tex]
[tex]1.7 \cdot 10^{-4}(1.35 - x) - x^{2} = 0[/tex]
After solving the above quadratic equation and taking the positive value for x (concentrations cannot be negative), we have:
[tex] x = [HCOO^{-}] = [H_{3}O^{+}] = 0.0151 M [/tex]
Therefore, the concentration of HCOO⁻ at equilibrium is 0.0151 M.
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Related Questions
The substance that is dissolved in another substance to create
a solution is called the
Answers
Answer:
The substance that is dissolved in another substance to create a solution is a Solute. A Solute is a minor component in a solution which is a substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.
Explain why a hydrogen atom doesn’t have a neutron in its nucleus.
Answers
Answer: Hydrogen does not contain neutron, because its nucleus is smallest in size which cannot accommodate any heavier neutron. It also makes hydrogen atom unstable in nature.
Explanation:
Which properties cause chemical reactions?
chemical properties
chemical and physical properties
physical properties
neither chemical nor physical properties
Answers
Answer:
Chemical Properties
Explanation:
Answer: chemical properties
Explanation: chemical bonds between atoms are formed or broken.
Katie looks out her bedroom window on a clear night. The stars in the sky look like tiny points of light.
Katie knows that the Sun is also a star, but it looks much larger than all of the other stars in the sky.
Why do the stars in the night sky look so much smaller than the Sun?
Answers
Answer:
The Sun looks bigger than other stars because its more closer to the earth than the stars.the farther anything is distant from us the tinier it will look
Explanation:
plz mark brainliest if thats ok|?
A solid is heated to its melting point and the resulting liquid is heated. Choose the graph below that shows these temperature changes.
Answers
Label the molecular view.
Label the species in the atomic-scale picture to represent the result when equimolar amounts of
aqueous barium hydroxide and aqueous iron(II) chloride are combined.
Ba
FeCl2
Fe(OH)2
Ba(OH)2
Ba2-
Cl2
CI
Fe
BaCl2
Fe2-
OH
H2O
solid =
Fe(OH)2
Answers
The elements should be label as follows yellow = OH, blue = Fe, green = Ba, red = Cl
The mix between aqueous barium hydroxide and aqueous iron chloride leads to barium chloride and iron hydroxide. This reaction is shown below:
Ba(OH)2 + FeCl3 → BaCl2 + Fe(OH)3Moreover, in these products, the iron hydroxide will form a solid substance that precipitates in the bottom of the container, while the barium chloride is more likely to maintain its liquid state.
According to this, the substance in the bottom is the iron hydroxide or Fe (OH)2, and in this, the yellow dots represent the Hydroxide or OH, while the blue dots are the Iron considering there in iron hydroxide there are two molecules of OH for each molecule of iron.
On the other hand, at the top, there is the barium chloride or BaCl2. This means the green dots are the Barium and the red ones are the Chlorine as there should be more Chlorine particles than Barium ones
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Ryan just joined the track team. He runs the 40 yard dash in 6.4 seconds. Explain three human body systems that work together to help Ryan run.
Answers
Answer:
Respiratory because you use a lot of cellular respiration to bring oxygen into the body.
Nervous because signals are sent from our brain to our muscles.
Circulatory to help with breathing and movement of blood and oxygen
Explanation:
Hope this helps!
What is the specific heat of a diamond if 4.5 J of heat is required to heat a 0.72 g piece of diamond
from 10°C to 22.3°C?
Answers
Answer:
0.51 J/g°C
Explanation:
Please help me with the following question below:
Answers
Molarity as Stoikiometri
Level : SHSEquatuions od Molarity :
M = m/Mr × 1000/V
Mr Lithium Dichromate (Li2CrO4)
= Ar Li (2) + Ar Cr + Ar O (4)
= 7 (2) + 52 + 16 (4)
= 14 + 52 + 64
= 130 g/mol
Molarity
= m/Mr × 1000/V
= 19.5 g/130 g/mol × 1000/95 mL
= 0.15 mol × 10.53 /L
= 1.5795 mol/L
So, the molarity of the solution is 1.5795 mol/L
#LearnWithEXO
https://phet.colorado.edu/sims/html/collision-lab/latest/collision-lab_all.html
Answers
Answer:
its not pulling up ? ;(
Explanation:
An automatic response of the body that occurs very rapidly and with-out conscious control is called
Answers
Answer:
Reflex.
Explanation:
Because it can occur very rapidly and without conscious control.
please help me solve this
Answers
Answer:
dude your handwriting!!!
Which statement describes a shortcoming of Rutherford’s model of the atom?A.
It incorrectly placed most of the atom’s mass in the nucleus.
B.
It did not explain how electrons behaved and why they don’t collide with the nucleus.
C.
It did not account for the fact that atoms have equal numbers of protons and electrons.
Answers
A shortcoming of Rutherford’s model of the atom is it did not account for the fact that atoms have equal numbers of protons and electrons. Therefore, option C is correct.
What is rutherford's model ?Ernest Rutherford, a scientist who was born in New Zealand, developed the Rutherford model to explain an atom. Rutherford oversaw the Geiger-Marsden experiment, which, after Rutherford's analysis in 1911, indicated that J. J. Thomson's plum pudding model of the atom was flawed, in 1909.
The first person to recognize an atom's nucleus was Rutherford. He attacked gold with -particles and discovered that there was positively charged material inside the atom as a result.
It did not explain the distribution of the atom's negatively charged electrons around its positively charged nucleus.
Thus, option C is correct.
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What is the difference between a theory and a scientific law?
Answers
Think of it like theory and physics.
A theory is an idea that needs to be tested.
Scientific law is something that cant be proven wrong.
if there is 5 atoms of oxygen in the reactant, how many oxygen atoms must be in the product
Answers
Answer:
5
Explanation:
It requires 20 chracters to fill this answer
Question 5 of 5
Which idea was not supported by Dalton's atomic model but was supported in
all later atomic models?
A. A central, positive nucleus
B. Electrons in orbits
C. Positive and negative parts
D. Electron clouds
Answers
Answer:
It’s A
The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons. However an atom is the smallest particle that takes part in chemical reactions. According to Dalton, the atoms of same element are similar in all respects.
MARKING BRAINLIEST! HURRY!!
Read the following list of objects:
a flying insect, a stretched elastic band, a falling stone, a flowing river, a coiled spring
Which of the objects have only potential energy?
A flying insect, a coiled spring
A stretched elastic band, a coiled spring
A falling stone, a flying insect
A flowing river, a flying insect
Answers
Answer:
a coiled spring
Explanation:
The diameter of Mercury is 4,878,000 meters.
Type your answer..
Answers
Answer:
The diameter of a mercury atom is 151 pm and the diameter of the planet Mercury is 4,879.4 km.
how many molecules of oxygen are needed to make 3.5 oxygens of water?
Answers
Answer:
57.6g
Explanation:
So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.
How many grams of O2 are present in 44.1 L of O2 at STP?
a.10.0 g
b.16.0 g
c.32.0 g
d.410.0 g
e. 63.0 g
Answers
Taking into accoun the STP conditions and the ideal gas law, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
First of all, the STP conditions refer to the standard temperature and pressure, where the values used are: pressure at 1 atmosphere and temperature at 0°C. These values are reference values for gases.
On the other side, the pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.n is the number of moles of the gas.Then, in this case:
P= 1 atmV= 44.1 Ln= ?R= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 0°C =273 KReplacing in the expression for the ideal gas law:
1 atm× 44.1 L= n× 0.082 [tex]\frac{atmL}{molK}[/tex]× 273 K
Solving:
[tex]n=\frac{1 atm x44.1 L}{0.082\frac{atmL}{molK}x273K}[/tex]
n=1.97 moles
Being the molar mass of O₂, that is, the mass of one mole of the compound, 32 g/mole, the amount of mass that 1.97 moles contains can be calculated as:
[tex]1.97 molesx\frac{32 g}{1 mole}[/tex]= 63.04 g ≈ 63 g
Finally, the correct answer is option e. 63 grams of O₂ are present in 44.1 L of O2 at STP.
Learn more about the ideal gas law:
https://brainly.com/question/4147359?referrer=searchResultsThe mass of 2.50 moles of calcium fluoride (CaF2) is how many
grams.
Answers
Answer:
195.199 grams
Turn on "Show formula". What is the formula of this compound?
Answers
Answer:
you can find the answer in this link
https://www.coursehero.com/file/p4kfbhi5/B-Turn-on-Show-formula-What-is-the-formula-of-this-compound-Li2O-C-Turn-on-Show/
who do you think has the problem in this communication process
Answers
Answer:
what
Explanation:
i d k what this question is
the modern periodic table is organized by increasing ______________ ___________.
Answers
Answer:
atomic number.
Explanation:
Answer:
Atomic number
Explanation:
The modern periodic table lists the elements in order of increasing atomic number (the number of protons in the nucleus of an atom).
PLS MARK BRAINLIEST
If the roller coaster car in the above problem were moving with twice the speed (4m/s), then what would be its
new kinetic energy?
Answers
Explanation:
New kinetic energy= ½mv'²
v' =4m/s
m= 2000kg
KE = ½ (2000) (4)²
=16000 Joules
#1. Boyle's Law. A gas with a volume of 4.0 L at a pressure of 205 kPa is allowed to expand to a volume of 12.0 L.
What is the pressure in the container if the temperature remains constant? (Answer is 6.8 kPa).
I NEED TO FIND HOW YOU GET TO THAT ANSWER
Answers
The final pressure in the container if the temperature remains constant is 68.3 kPa.
Given the following data;
Initial volume, V1 = 4.0 liters Initial pressure, P1 = 205 kPa Final volume, V2 = 12.0 LitersTo find the final pressure in the container if the temperature remains constant, we would use Boyle's Law:
Mathematically, Boyle's law is given by the formula;
[tex]P_1V_1 = P_2V_2[/tex]
Where;
P1 is the original (initial) pressure. P2 is the final pressure.V1 is the original (initial) volume. V2 is the final volume.Substituting the values into the formula, we have;
[tex]205[/tex] × [tex]4 =[/tex] [tex]12P_2[/tex]
[tex]820 = 12P_2\\\\P_2 = \frac{820}{12}[/tex]
Final pressure, P2 = 68.3 kPa
Therefore, the final pressure in the container if the temperature remains constant is 68.3 kPa.
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what is the net ionic equation for ammonium chloride and sodium hydroxide
Answers
Answer:
In the complete ionic equation, soluble ionic compounds and strong acids are rewritten as dissociated ions. write the ionic and net ionic equation for this equation: Ammonium Chloride + Sodium Hydroxide NH_4Cl + NaOH = NH_3 + H_2O + NaCl There are so many chemical reactions that occur around us that we classify them into different types.
Explanation:
Which two of these formulas have an equal number of carbon atoms present?
1 - MG3(PO)2
2 - Na SO4
3 - NO3(CH3)3
4 - C&H 206
5 - Al(NO3)3
3 and 4
1 and 2
3 and 5
3, 4, and 5
Choose the correct answer.
Answers
Answer:3 and 4
Explanation:I got it right on a quiz.
Answer:
3 & 4
Explanation:
Please help me!! I will literally pay you if you do my one aleks topic due tomorrow!! I have multiple example problems. It’s same Q different numbers
Answers
Answer:
I'll do it if you give brainlyest and some points
Describe the five layers of the earth by providing the following information for each layer:
Name of the layer
Composition
Average temperature
Average thickness
make simple! pls
Answers
Answer:
answers below
Explanation:
Lithosphere/ Crust- made of large plates that move, average thickness is 30 km, average temperature is 25 degrees Celsius
Inner Core- made of solid iron, 1,200 km thick, 7,000 degrees Celsius
Outer Core- made of a dense liquid of iron and sulfur, 2,250 km thick, 4,000 degrees Celsius
Lower Mantle- made of solid rock, 2,200 km thick, 3,000 degrees Celsius
Asthenosphere/ Upper Mantle- made up of solid rock that flows due to plasticity, 720 km thick, 850 degrees Celsius