![A Student Mixes 40. ML Of 0.10 M HBr(Aq) With 60. ML Of 0.10 M KOH(Aq) At 25C. What Is The [OH-] Of The](https://brainimage.s3.us-east-005.backblazeb2.com/contents/attachments/EMpSC8ReVM02MSDrTK5HrJp7Gsk1N2Y6.png)
Answers
After the complete neutralization reaction occurs, excess hydroxide ion is left unreacted and concentration of the hydroxide ion, [OH-] is 0.02 M.
What is the concentration of the hydroxide ion, [OH-]?The hydroxide ion concentration is the amount in moles of hydroxide ion in a solution.
The hydroxide ion concentration is written as [OH-].
The equation of the reaction is given below:
[tex]HBr(aq) + KOH(aq) \rightarrow KBr(aq) + H_2O(l) \\ [/tex]
1 mole of HBr reacts with 1 mole of KOH
Moles of HBr = 40 mL × 0.1 M = 4 mmmoles
Moles of KOH = 60 mL × 0.1 M = 6 mmoles
Moles of [OH-] = 6 - 4 = 2 mmoles
Volume of solution = 100 mL
[OH-] = 2mmoles/100 mL = 0.02 M
Therefore, the concentration of the hydroxide ion, [OH-] is 0.02 M.
Learn more about concentration at: https://brainly.com/question/24595796
Related Questions
What is the molarity of a solution that is prepared by adding 3 moles of CaSO4 in 1.5 L of water?
Answers
Answer:
[tex][CaSO_4] = 2 mol/L[/tex]
Explanation:
[tex][CaSO_4] = \frac{3 mol}{1.5 L} = 2 mol/L[/tex]
how is preciptation formed
(im rlly bad at this D:
Answers
Answer:
precipitation is formed by to much water in a cloud
Explanation:
Kathleen makes iced coffee by adding ice to her room temperature coffee in a glass. What statement explains what is taking place inside her glass?
The ce molecules will slow down over time.
The coffee molecules will speed up over time.
The cold is transferred from the ice to the coffee.
The heat is transferred from the coffee to the ice.
Answers
Answer:
The answer is the heat is transferred from the ice to the coffee.
Explanation:
Hot molecules tend to transfer to colder molcules, which causes the ice to melt and makes the coffee colder.
Hope this helps! :)
write the net ionic reaction for barium nitrate + lithium iodide
Answers
The net ionic reaction for barium nitrate and lithium iodide showing the precipitation of barium iodide is given below:
[tex]Ba^{2+}(aq) + 2I^{-}(aq) \rightarrow BaI_2(s)[/tex]
What is a net ionic equation?A net ionic equation is an ionic equation which shows only the ions that have undergone both reduction and oxidation only without any spectator ions present.
The net ionic reaction for barium nitrate + lithium iodide is given below:
[tex]Ba^{2+}(aq) + 2I^{-}(aq) \rightarrow BaI_2(s)[/tex]
Therefore, net ionic reaction for barium nitrate and lithium iodide shows the precipitation of barium iodide.
Learn more about net ionic equation at: https://brainly.com/question/13879496
Small bodies from which the planets formed are called _____.
Answers
Answer:
The small bodies from which the planets formed are called planetesimals.
How much heat must be removed from 75.0 g of water at 90.0°C to cool it to 23.0°C?
Answers
Answer:
See below
Explanation:
75 g * ( 90 - 23) C * 1 cal / g-C
= 5025 cal = 21 034 .7 J
is CH3NH2O ionic or covalent
Answers
Answer:
i think ionic?
Explanation:
hope this helps
What is the number of moles of solute in 7.3L of a 4.6M solution?
Answers
Answer:
33.58 Moles
Explanation:
7.3 L * 4.6 M / L = 33.58 Moles
What is the molarity of the 8.76 g of Na2S dissolved in 0.500 L of solution?
Answers
Answer:
.224 M
Explanation:
To begin, we need to find the molar mass of Na2S
Na=22.99g, S=78.05g2(22.99)+1(32.07)=78.05To find Molarity, we use the equation M=moles/Liters of solution
We are given grams, so we must divide by the molar mass of Na2S to find moles.
8.76g Na2S / 78.05g/mol Na2S= .112 molesNow we use our Molarity equation:
.112 moles Na2S / .500L of solution = .224 MSOLUTIONS
SHOW COMPLETE, CONVINCING WORK FOR THE FOLLOWING:
1.
A student is instructed to make 500.0 ml of 1.200 M silver nitrate solution for a lab. A stock solution of 5.00 M silver nitrate
is available. How many milliliters of the stock solution are required to make the solution needed for the lab?
120 mL
Answers
Answer: Because percent solutions can be expressed in three different ways, it is imperative that the type of percent solution be explicitly stated. If this information is not provided, the end user is left to "guess" whether w/v %, w/w %, or v/v % was used. Each percent solution is appropriate for a number of different applications. For example, commercial aqueous reagents, such as concentrated acids and bases, are typically expressed as weight/weight % solutions. For example, commercially available concentrated hydrochloric acid (HCl) is 37% by weight (w/w %). On the other hand, many dilute solutions used for biological research are expressed as weight/volume % (e.g., 1% sodium dodecyl sulfate, SDS). Volume/volume % solutes are also common, and are used when pure solutes in liquid form are used. For example, a 70 % (v/v) solution of ethanol can be prepared by dissolving 70 mL of 100% (i.e., 200 proof) ethanol in a total solution volume of 100 mL.
If 100g of nuclear waste Pu-239 is generated in a nuclear reactor, how long will it take to reduce down to 6.75g of Pu-239?
Answers
Answer:
See below...
Explanation:
6.79 = 100 ( 1/2)^n solve for n = number of half lives
3.88 half lives
3.88 * 24000 = 93 130.7 years
Do you think a benitoite ring would be costly or inexpensive?
Answers
Answer:
I think it would be costly due to the fact that the gem is very rare and gorgeous. Also, the current prices are on average $3,000 per carat, so I would say that is pretty costly.
Explanation:
Hope this helps:)....if not then sorry for wasting your time and may God bless you:)
Another word for axis tilted on its side
Answers
As far as terrain, mountainous northern coast otherwise known as the
A. Sierra Nevada Mountains
B. Atlas Mountains
C. Rif Mountains
D. Appalachians
Answers
That should be your answer for the mountainous northern coast.
How much energy is needed to raise the temperature of 15.21 g of a substance with a specific heat of 1.65 J/g°C from 137.0 °C to 234.3 °C?
Answers
Answer:
2441.9 Joules
Explanation:
This is a sensible heat change problem.
Energy = Specific Heat Capacity x Mass x Change in Temperature
To find the change in temperature, you need to use this formula: Temperature Final - Temperature Initial.
234.3 - 137.0 = 97.3
Energy = 1.65 x 15.21 x 97.3
Multiply that equation, and you get your answer! I hope this helps!
Carbon Dioxide's Effects on Temperature (Edmentum)
Task 2:
Carbon Dioxide's Effects on Temperature
In this activity, you will use sodium bicarbonate tablets to see the effects of carbon dioxide on temperature. Sodium bicarbonate tablets are effervescent tablets that release carbon dioxide when dissolved in water.
Estimated time to complete: 1 hour
You will need these materials:
2 empty two-liter plastic bottles (or two similar-sized plastic containers with tight-sealing lids), rinsed
2 thermometers (not mercury)
1 liter of water, room temperature
a ball of clay, about 2 inches in diameter (needed only if you’re using two-liter plastic bottles)
2 sodium bicarbonate tablets (such as Alka-Seltzer)
a lamp with a 150-watt incandescent bulb (if direct sunlight is not available)
Follow these steps to set up the experiment. Then answer the question in part A.
Fill both bottles with water until they are half full.
In one bottle, place two sodium bicarbonate tablets.
Plug the opening of the two bottles tightly with clay. The clay will act as the cap.
Place one thermometer in each bottle by carefully piercing it through the clay, so that the thermometer dangles in the air inside the bottle. Stay safe: do not use mercury thermometers in the event that they might break. The bottles must remain tightly sealed. The thermometer must not touch the water.
Put both bottles in front of the lamp or in direct sunlight. Turn on the lamp and let the bottles stand for one hour. Stay safe: To avoid electrocution, keep all water away from electrical sources.
Hypothesis and Data Collection
Part A
Write down your predictions. After an hour, do you think there will be a temperature difference between the two bottles? Explain.
Part B
After one hour, record the temperatures. Write down your results.
Analyze and Extend
Part A
Was your prediction about the temperatures in the two bottles correct? Explain.
Part B
In your experiment, what is the dependent variable and what is the independent variable?
Part C
The tablets were a source of carbon dioxide. What can you conclude about the effect carbon dioxide has in the atmosphere?
Part D
The burning of fossil fuels, such as gasoline, coal, and oil, increases the amount of carbon dioxide in the atmosphere. Based on your experiment, what effects could this burning have on Earth’s temperature?
Part E
Mary is concerned about greenhouse gases in the atmosphere. She wants to buy an electric car that doesn’t use gasoline at all. What questions should Mary ask about electric cars to ensure that she is making a good choice for the environment?
Dispose of your waste properly:
Pour the water down the drain.
Rinse and recycle the plastic bottles.
Reuse the clay or place it in the trash.
Answers
Answer:
“You Asked” is a series where Earth Institute experts tackle reader questions on science and sustainability. Over the past few years, we’ve received a lot of questions about carbon dioxide — how it traps heat, how it can have such a big effect if it only makes up a tiny percentage of the atmosphere, and more. With the help of Jason Smerdon, a climate scientist at Columbia University’s Lamont-Doherty Earth Observatory, we answer several of those questions here.
Identify those elements that can be isolated by electrolysis of their aqueous salts. (Select all that apply.)
lithium
tin
strontium
chlorine
Answers
Many states require drivers to use hands-free cell phones only. A) TrueB) False
Answers
Answer:
True.
Explanation:
Typically, cars have built in radios for the reason of not using your phone. That's why you connect it with bluetooth to call, text, and use personal music instead of listening to the ones on the radio.
Answer:
True
Explanation:
It is to keep us safe. So, we answer calls without having to take our hands off the wheel. Although it is unsafe for that aswell. The best thing to do is have 0 things that would keep you from having your eyes on the road.
Correct formula for barium hydroxide
Answers
Ba(OH)2
HOPE IT HELPS...!!!
Write the letter of the correct answer on the line
1.
-Which of the following is an opening
through which molten rock and gas leave a
volcano?
A pipe
B magma chamber
C crater
D vent
Answers
Answer:
D. Vent is the answer please
Ideal Gas Law 1
Calculate the volume of 3.00 g of carbon dioxide gas at 288K and 123.3 kPa.
Give your answer in litres to three significant figures. Do not include units.
Answers
Answer:
1•323
Explanation:
mass of carbon=12
mass of oxygen=2*16=32
no of moles = 3/44
PV=nRT
V=(0.06818*8.31*288)/123.3*10^3
Which statements about fresh-water sources are true.? (Multiple Choice) (please help asap thanks!:)
Answers
Answer:
The correct answers are:
"Only about 3 percent of Earth's water is fresh water."
"About 75% percent of the fresh water on Earth is frozen in ice sheets."
"The largest source of usable fresh water is groundwater."
Explanation:
3 percent of Earth's water is most certainly fresh water. Confirmed with a few fact checks.
The largest source of usable fresh water on Earth is groundwater. It's more difficult to access but it's there and much more usable than water say frozen in ice on the sea.
The most correct option left would be 75% of Earth's freshwater being in ice sheets even though it's about 70%.
What is another word for a substance that is a base?
A.
indicator
B.
amphoteric
C.
buffer
D.
alkaline
Answers
Answer:
D) alkaline
Explanation:
A particle has a velocity that is 70 % of the speed of light and weighs 206.8 times the mass of an electron. Find the wavelength of this particle?
Answers
Mass of electron = 9.11x10^-31 kg
70% of 3x10^8 = 2.1x10^8 m/s
206.8*9.11x10^-31 = 1.88x10^-28 kg
Equation for wavelength is: wavelength= plancks constant / (mass*velocity)
Plancks constant = 6.62x10^-34 m^2 kg/s
Plug all of these in and you get: 6.62x10^-34 / (1.88x10^-28/2.1x10^8) = 739.47
Your answer is 739.47 m
What’s the answer to this?
Answers
Benzene
Benzene has low density than the water itself of about 0.9 g/cm³
Low denisty object than the water usually floats on the water.
Another example: orange peel which floats on water has density of about 0.84 g/cm³
If 10 moles of a gas are at a pressure of 3.6 atm and at a temperature of 27°C, what is the volume of the container that the gas is in.
Answers
Answer:
68.4 liters
Explanation:
PV = nR T R = gas constant = .082057 L atm / K-mole
n = 10 T = 27C = 300.15 K
3.6 V = 10 * .082057 * 300.15 solve for V = 68.4 liters
Bonding with intermolecular forces:
1.) is IBr a hydrogen bonding? yes or no?
2.) is IBr dipole-dipole interactions? Yes or no?
3.) is IBr a london dispersion forces? Yes or no?
Answers
Answer:
1.) is IBr a hydrogen bonding? yes or no? =No, IBR isn't a hydrogen bonding beacuse there are no H atoms and neither atom is N, O, F.2.) is IBr dipole-dipole interactions? Yes or no? = Yes, IBR is a dipole-dipole interactions beacuse Both I and Br are large molecules with lots of electrons.3.) is IBr a london dispersion forces? Yes or no?= No, IBR isn't a london dispersion forces because IBr is a polar dispersion force.Answer :
See below ~
Explanation :
1) No
IBR isn't a hydrogen bonding beacuse : there are no H atoms and neither atom is N, O, F.2) Yes
IBR is a dipole-dipole interactions beacuse Both I and Br are electronegative (dipolar) molecules with lots of electrons.3) No
IBR isn't a london dispersion forces because IBr is a polar dispersion force, and London forces are only present in non-polar dispersion forcesPlease solve the question.
Answers
Answer:
B
Explanation:
I think it might be B because if the student's hypothesis was incorrect why redo it and make sure the results are the same as last time if it was already incorrect before.
One pound (1.00 lb) of body fat is equivalent to approximately 3.488 x 103
kcal.
The average amount of calories burned during running is 125 kcal/mile.
How many miles does an athlete have to run to burn off 1.00 lb of body fat?
Show your calculations.
Your Answer:
1 mil
2400
270
Answers
Since one pound (1.00 lb) of body fat is equivalent to approximately 3.488 x 10^3 kcal, then 27.9 miles must be covered to burn off one pound.
What is energy?Energy is defined as the ability to do work. Now we are told that one pound (1.00 lb) of body fat is equivalent to approximately 3.488 x 10^3
kcal.
Hence;
If 125 kcal is burnt by running one mile
3.488 x 10^3 kcal is burnt by running x miles
x = 3.488 x 10^3 kcal * 1 mile/125 kcal
x = 27.9 miles
Learn more about energy: https://brainly.com/question/1932868
Which chemical equation is balanced
Answers
Answer: D
Explanation:
The reason it is D is because a balanced chemical equation will always have the same number of atoms on both sides. In answer d, both sides have a total of 4 atoms, so it it balanced.