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
when an ion has a positive charged what has the highest value of this ion ?
is it
proton
neutron
electron
nucleon
and why did you choose tte answer ?
Answers
Answer:
Highest charge +4ProtonExplanation:
Why +4?
Elements have valency starting from -4 to +4Point to be noted that only Carbon family elements can show +4 or -4 valencywhich is a semi conductor? metal, nonmetal, mettaliod
Answers
Answer:
mettaliod
Explanation:
Answer:
Metalloids have properties intermediate between the metals and nonmetals. They can form alloys with other metals. … Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semiconductors.
Explanation:
Mark me as the brainlyest
Hybridization
of Bromine in BrF5
Answers
Answer:
the hybridization of bromine in BrF5 is SP³d².
Explanation:
Because its forms five single bond &have one lone pair that consider as sigma. So total sigma bond is 6. Hence hybridisation is SP³d².
Is each ion stable? Explain.
Answers
Answer:
By satisfying the duet rule or the octet rule, ions are more stable.
Explanation:
Ionic bonds are formed through the exchange of valence electrons between atoms, typically a metal and a nonmetal. The loss or gain of valence electrons allows ions to obey the octet rule and become more stable.
The octet rule states that an atom is most stable when there are eight electrons in its valence shell. Atoms with less than eight electrons tend to satisfy the duet rule, having two electrons in their valence shell. By satisfying the duet rule or the octet rule, ions are more stable.
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help meeee I BEG YOU!
Answers
E brainliest
A 300 milliliter container that is filled with 100 milliliters of oxygen and 200 mL of hydrogen has a total pressure of 750 milliliters of mercury. What is the partial pressure of the oxygen
Answers
Earth's lithosphere floats on a hot, plastic layer which allows plate movement. What is this layer called?
crust
asthenosphere
atmosphere
core
Answers
Answer:
atmoshpere
Explanation:
il explain in comment if you brainly me
when particles of unreactive .... collide, they bounce off each other at high speed without any loss of energy. What word is supposed to be filled in on the dots?
Answers
Answer:
Groups
Explanation:
The groups determine if the atom is reactive or not, take the Noble Gases for example, they are very very very unreactive.
Which of the following resources can be obtained from the hydrosphere?
Answers
HOPE THIS HELPS YOU!!!!!
What particles would you find in a nucleus of an atom
Answers
Answer:
The nucleus is a collection of particles called protons, which are positively charged, and neutrons, which are electrically neutral. Protons and neutrons are in turn made up of particles called quarks. The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus.
Covalent bonds take place between..
A. A metal and a nonmetal
B. A metal and a metalloid
C. Two nonmetals
D.two metals
please answer this question. No links please!!!
Answers
Answer:
Covalent Bonds are formed when two non-metals share electrons
Hope this helps
Nitroglycerine, used to treat patients with angina, is prescribed for a patient by IV at a rate of 2.10 x 102 ug/min. The IV bag
contains 50. mg nitroglycerine/250 mL D5W. How many milliliters per hour should the patient receive?
Answers
Given the flow rate and the amount of nitroglycerine contained in the IV bag, the patient should receive 63 milliliters per hours.
Rate of prescribed dose by IV: [tex]2.10*10^2 ug/min = 210ug/min[/tex]
Available: [tex]50mg nitroglycerine = 50000ug[/tex]
Available Volume: [tex]150mL[/tex]
Hence, [tex]50000ug = 250ml[/tex]
and volume for [tex]210ug = x[/tex]
We cross multiply to find x
[tex]x = \frac{210ug * 250mL}{50000ug} \\\\x = 1.05mL[/tex]
Meaning that in a single minute, 1.05mL is been infused into the patient
Now, for an hour, ( 60 minutes ) the volume infused will be;
[tex]1min = 1.05mL[/tex]
[tex]60min = x[/tex]
We cross multiply to find x
[tex]x = \frac{1.05mL*60min}{1min}\\\\x = 63mL[/tex]
Therefore, given the flow rate and the amount of nitroglycerine contained in the IV bag, the patient should receive 63 milliliters per hours.
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1. Since the electron has a negative electric charge and the nucleus has a positive
electric charge, where would you expect to find electrons in atoms?
Answers
What causes high and low tides on Earth? A. The moon's gravitational pull on Earth causes water to bulge on two sides of Earth.B. Earth's rotation is so fast, water will swell and shrink twice a day.C. Earth is tilted on an axis, causing water to spread unevenly throughout the planet.D. Water swells when tsunamis occur in two areas of Earth at the same time. PLZ HELP FAST
Answers
Answer:
A.
The moon's gravitational pull on Earth causes water to bulge on two sides of the Earth.
Drag electrons back and forth until the molecule of oxygen (O2) is stable. Click Check to confirm your molecule is stable. How many pairs of shared electrons are there in a stable molecule of oxygen?
Answers
Answer:
2 pairs (4 electrons)
Explanation:
In a molecule of oxygen there are 2 oxygen atoms. There are 6 electrons in the outer shells of oxygen atoms. When 2 oxygen atoms form a covalent bond they share their electrons. In a diagram this would be represented by the overlap of the two circles representing the outer shells of both oxygen atoms. If each oxygen atom 'puts forward' 2 electrons into the centre, then 4 will be shared overall for each atom, making both atoms have full outer shells of 8 electrons each. 4 electrons make 2 pairs, hence the answer.
Explain why you would want to keep some, but not all, receipts as part of your financial records.
Answers
Answer:
Explanation:
Let's try and figure out the ones you don't keep.
Receipts from the dollar tree. You can't return what you bought and you only paid a dollar. It's not worth it.
Food receipts. You can't return it and unless you want to itemize what you spend / month and on what, they don't serve any purpose.
Now figure out which ones you would want to keep
1. Anything pertaining to medical perscriptions. I don't know how it works in the United States, but in Canada we are allowed to deduct only medications with a DIN number.
2 Anything that you would use for travelling that is not for pleasure (ie it is a business expense). So if you are a salesman and your territory is from A to B you would deduct meals, mileages, motels if you must stay away from home
3 In the states some tax receipts are deductible, so you might want to save those.
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Which factor most directly affects potential energy but not kinetic energy?
Mass
Density
Velocity
Elasticity
Answers
Answer:
Velocity is the answer I hope it helps
Explanation:
Answer:
velocity
Explanation:
For each of the three ionic compounds, select which main group X belongs to.
X₂PO4
Answers
Answer:group 1A(1)
Explanation:
which of the following terms completes the sentence below? to fill out a sign chart, you will need to use test numbers before and after each of the functions zeros and ___? A asympototes B expressions C proportions D values
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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Combustion of 28.0 g of gasoline releases 322 kcal of thermal energy. How many kilojoules of energy are released?
Answers
In the combustion of 28.0 g of gasoline, 1348.1 kilojoules of energy are released.
To find the energy released, we need to convert the energy in kilocalories to kilojoules.
We need to remember that:
1 cal = 4.1868 J (joules)1 kcal = 1000 cal1 kJ = 1000 JHence, the energy in kJ is:
[tex] E = 322 \:kcal*\frac{4.1868 \:J}{1 \:cal}*\frac{1000 \:cal}{1 \:kcal}*\frac{1 \:kJ}{1000 \:J} = 1348.1 \:kJ [/tex]
Therefore, 1348.1 kilojoules of energy are released.
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2 2.5.2 Test (CST): Computer-Scored Unit Test
Question 23 of 25
Which of the following best defines an acidic solution?
A. A solution with a pH greater than 7
B. A solution with a pH less than 0
C. A solution with a pH equal to 7
D. A solution with a pH less than 7
SUBMIT
Answers
Answer:
a solution with pH greater than 0
Explanation:
Please help me help please help
Answers
Answer:
i don't know if Im converting it to newtons or picograms
Explanation:
in newtons the coefficient is 8.5 and the exponent is 2. sorry if i'm wrong
Which of the following sets of quantum numbers is not allowed?
A.) n=3, l=2, ml=-2
B.) n=4, l=3, ml=-3
C.) n=2, l=1, ml=-1
D.) n=2.5, l=0, ml=0
E.) n=3, l=2, ml=-1
Answers
Answer:
D) n = 2.5, ℓ = 0, mℓ = 0
Explanation:
According to the rules governing acceptable quantum numbers, the value for n must be an integer. Therefore, the set {n = 2.5, ℓ = 0, mℓ = 0} is not allowed.
9. Imagine that one of your kitchen workers tells you that he believes your kitchen has a pest problem and
might be facing an infestation. While you trust this employee, you want to see for yourself. What would you
look for in trying to determine if you have a pest problem or not? Describe the key signs that you would look
for and what you would do if you determined that you were suffering from a pest problem.
Answers
Answer:
well there are many ways to prevent a pest infestation ..... as we all know ... insects such as ants love leftovers, so store food in airtight containers like Tupperware or jars with rubber seals on the lids.
Keep a tight lid on your trash can at all times and move the trash to an outside dumpster as soon as possible.
Clean your counter tops, tables, and floors on a regular basis to prevent crumbs or food buildup
Explanation:
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Using one or more of your senses to gather information is called
observing
c predicting
b inferring
d classifiying
Answers
Answer:
using one or more of your senses is Observing
what would happen if you added silver nitrate to a solution of sodium chloride?
Answers
Answer:
When silver nitrate solution is added to sodium chloride solution, then a white precipitate of silver chloride is formed along with a sodium nitrate solution.
Explanation:
when silver nitrate solution is added to sodium chloride solution, a white precipitate of silver chloride is formed along with sodium nitrate solution.
AgNO3 + NaCl ----- AgCl + NaNO3
AgCl is white precipitate.
double displacement reaction
Which location in the diagram above is the Southern Hemisphere experiencing summer?
Location A
Location B
Location C
Location D
Answers
Answer:
location a
Explanation:
Answer:
Location B
Explanation:
Write a balanced chemical equation for the standard formation reaction of gaseous nitrogen monoxide (NO). Please help me
Answers
Answer:
N2 + O2 ------------->2NO(Balanced Reaction)
A balanced chemical equation for the standard formation reaction of gaseous nitrogen monoxide (NO) -
1/2 [tex]N_{2}[/tex] (g) + 1/2 [tex]O_2[/tex] (g) -----------------> NO (g)
Synthesis or formation reactions involve the combination of two or more substances that will react. There is only one product of a synthesis reaction.
Chemical reactions involve the rearrangement of electrons between elements resulting in the formation of a new substance.in a standard formation reaction, one mole of a substance is produced from its elements in their standard states.Standard formation reaction at 25 degrees C and 1 atm pressure.1/2 [tex]N_{2}[/tex] (g) + 1/2 [tex]O_2[/tex] (g) -----------------> NO (g)
Thus, A balanced chemical equation for the standard formation reaction of gaseous nitrogen monoxide (NO) -
1/2 [tex]N_{2}[/tex] (g) + 1/2 [tex]O_2[/tex] (g) -----------------> NO (g)
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PLEASE PLEASE HELP ME WITH THIS ASAP
Answers
Answer: 3.45
Explanation: