Answer:
1. The percent ionization in the potassium formate solution is smaller than that in pure water because of the common ion effect.
2. The equilibrium for the dissociation of formic acid is shifted to the left by this addition, and a smaller amount of acid dissociates.
Explanation:
The common ion effect refers to the effect on equilibrium that is observed when an ion that is already contained in the solution (common ion) is added to a solution. The addition of a common generally results in a shift in equilibrium positiont towards the removal of the common ion from solution. This is according to Le Châtelier's Principle which states that if an equilibrium becomes unbalanced, the reaction will shift to restore the balance.
The common ion effect decreases the ionization of a weak acid as the addition of more of an ion that is a product of this equilibrium will shift equilibrium towards removal of the ion.
Adding a common ion also decreases solubility, as the reaction shifts toward the left in order to annul the constraint of the excess ion in the product side of equilibrium.
The percent ionization in the potassium formate solution is smaller than that in pure water because of the Common ion effect. The equilibrium for the dissociation of formic acid is shifted to the left by this addition, and a smaller amount of acid dissociates.
What is Equilibrium law?Equilibrium law states that if any external effect is applied on the equilibrium state of any chemical reaction, then the equilibrium will shift towards that side where the effect will decrease.
Common ion effect occurs when the already present ion in the solution is further added to the solution which increases the concentration of that ion in the solution and equilibrium will shift towards the side where common ion effect will decreases.
That's why the percentage of ionization in the potassium formate solution is less than the percentage of ionization in pure water. And due to common ion effect equilibrium will shift towards the left side where dissociation decreases and the concentration of ions is also decreases.
Hence correct options are smaller, common ion effect, left and smaller.
To know more about common ion effect, visit the below link:
https://brainly.com/question/7223815
which type of blood vessel has a pulse
Answer:
The arteries should be your answer!
Explanation:
how many atoms of N are in 5.6g of N?
Answer:
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Explanation:
On a scale of 1️⃣ to , you’re a 9️⃣. I’m the 1️⃣ you need.
Number of atoms of C in 14 moles of C4H10 are:
5.81x10^23
24.09x10^23
84.31x10^23
337.23x10^23
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i) __________are rigid due to strong (ii)___________ of attraction between the particles
Answer:
Liquid Solids are rigid due to strong glass of attraction between the particles.
Explanation:
What I know about the Alveoli and Gas exchange
Explanation:
What happens during gas exchange in the alveoli?
These are called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.
What is the role of alveoli in gas exchange?
The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out. Oxygen breathed in from the air passes through the alveoli and into the blood and travels to the tissues throughout the body.
An aluminum pan and a copper pan have the same mass and are heated to the same temperature. Which will feel hotter?
Answer:
The copper pan!
Explanation:
Copper conducts heat well because its atoms contain only one free valence electrons in the outer shell. Elements with a low number of valence electrons transfer heat the best, and copper has only one. Valence electrons move about freely.
Good luck on your assignment!
Which of these metals will displace Iron from Iron Oxide ?
-Copper
-Magnesium
-Silver
-Tin
Answer:
Magnesium
Explanation:
Magnesium is above iron in the reactivity series, which means that Mg can take oxygen from iron as it is a more reactive metal.
Identify the products for Ca + H2O(l)
Answer:
i
Explanation:
Answer:
Ca(OH)2 + H2
Explanation:
hope this helps
What happens inside a can of spoiled food as gas is produced?
A. The pressure decreases.
B. The temperature increases.
C. The volume decreases.
D. The pressure increases.
Answer:D the pressure increases
Explanation:
Answer: D
Explanation:
the pressure increases
A cylinder, with a piston pressing down with a constant pressure, is filled with 1.90 moles of a gas (n1),
and its volume is 40.0 L (V1). If 0.400 mole of gas leak out, and the pressure and temperature remain the
same, what is the final volume of the gas inside the cylinder?
Answer:
31.58 L
Explanation:
From the question given above, the following data were obtained:
Initial mole (n₁) of gas = 1.90 moles
Initial volume (V₁) = 40 L
Final mole (n₂) = 1.90 – 0.40 = 1.5 moles
Final volume (V₂) =.?
The final volume of the gas can be obtained as follow;
V₁ / n₁ = V₂ / n₂
40 / 1.9 = V₂ / 1.5
Cross multiply
1.9 × V₂ = 40 × 1.5
1.9 × V₂ = 60
Divide both side by 1.9
V₂ = 60 / 1.9
V₂ = 31.58 L
Thus, the final volume of the gas is 31.58 L
Give a reason for each of the following laboratory practices:
I. KMnO4 solution is not acidified with HNO3 before titration
II.FeSO4 solution is usually prepared fresh when needed
III. Alkali are not stored in glass stoped reagent bottles
Answer:
See explanation
Explanation:
The acid commonly used to acidify KMnO4 is H2SO4. The reason why HNO3 is not used is because HNO3 is itself a strong oxidizing agent. HCl is not used because it can react with KMnO4.
FeSO4 solution is usually prepared fresh when needed because if the solution is prepared and left to stand for sometime, FeSO4 is oxidized to Fe2(SO4)3 by air. Fe III does not give the brown ring test.
Alkali are not stored in glass stopped reagent bottles because very strong alkali can cause the stopper to corrode and fuse to the neck of the bottle making it very difficult to open the reagent bottle.
ANSWERED
Graph the number of A particles versus the time and the number of B particles versus the time. Plot both data sets on the same graph.
How many moles of Na are in 42g of Na?
Answer:
n=m/M, so
Explanation:
Molar mass of Na is 22,9... so rounded to 23
n=42g/23g/mol
=1,826mol
The element Osmium has _ neutrons in its nucleus
Answer:
114
Explanation:
no
I need help with the true or false
Answer:
1. True
2. True
3.True
4. False
5. True
6. False
7.True
Explanation:
Which of these shows the correct hierarchical sequence?
organs cells ▸ tissues ► organ systems
cells ► tissues ► organs organ systems
organ systems tissues › cells organs
tissues cells organs ► organ systems
Answer:
cells -> tissues -> organs -> organ system
Answer:
Cells > tissues > Organs > Organs Systems
Explanation:
tissues are made of a group of cells
a specific organ is made up of a geoup of specific type of tissues
and a group of organs make up the organs system
15 15. Which two elements will form a covalent bond?
a. K & C c. Na & Ar
b. Ag & O d. C & Br
Answer:
K and Cl
Explanation:
85% of what number is 17? EXPLAIN
Answer:
85% of 20 is 17
Explanation:
You can multiply 85% and 20 or subtract 85% from 20.
how many mols of Ti is 3.15 * 10^23 atoms of Titanium
Answer: There are 0.523 moles of Titanium in [tex]3.15\times 10^{23}[/tex] atoms of Titanium
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given atoms}}{\text {avogadro's number}}[/tex]
[tex]\text{Number of moles of Titanium}=\frac{3.15\times 10^{23}}{6.023\times 10^{23}}=0.523moles[/tex]
Hydrogen gas + chlorine gas yields hydrogen chloride
Answer:
[tex]H_{2} + Cl_{2} --> 2HCl[/tex]
Explanation:
Hydrogen and chlorine are both diatomic, which means they occur in molecular pairs as gases. This means you will have two atoms of each on the left in the reactants, so you will need to add a coefficient of 2 to have 2 atoms of each on the right in the products.
Problems 307 How many milliliters of a 2.5 M NaCl solution would be needed to prepare each solution? a. 1.5L of a 0.75m solution
Answer:
450 mL
Explanation:
First we calculate how many NaCl moles would there be in 1.5 L of a 0.75 M solution, using the definition of molarity:
Molarity = moles / LitersMoles = Molarity * LitersMoles = 1.5 L * 0.75 M =1.125 molOnce again using the definition of molarity, we now calculate how many liters of a 2.5 M solution would have 1.125 moles:
Liters = 1.125 mol / 2.5 M = 0.45 LFinally we convert 0.45 liters to mL:
0.45 L * 1000 = 450 mLWhich describes the polarity in a water molecule?
A. partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
B. partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
C. partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
D. partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
The answer is B
Answer:
B. partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
Explanation:
Oxygen has a charge of 6 so they need to pull 2 electrons from hydrogen, which creates a partial negative charge.
True or False: A liquid's volume does not change no matter what the shape of its container.
Answer:
true
Explanation: becuase if you add the same liquid to a small container and then add it to a big container its going to have the same liquid amount it started with
What happens after coral is bleached?
It dies immediately
It produces peroxides
It is susceptible to starvation
It releases algae into the ocean
Explanation:
The Answer Is
That The Coral Releases Its Colours And Becomes Pale White
How many molecules of CO2 are present in 0.6642 moles of CO2?
Answer:
1* 6.022*10^23=6.022*10^23 molecules of CO2 are present.
What are the correct coefficients for the following chemical reaction:
Al +
Br2 --> __AlBr3
O 3, 3,2
O 2,3,2
0 2,2,3
O 3,2,2
Answer:
2Al + 3Br2 = 2AlBr3 so the second option is right
PLEASE HELP! DUE IN 5 MINS SUPER EASY CHEMISTRY!!
Which of the following compounds contain the largest number of atoms?
Answer:
C
Explanation:
Since they all are 2 mols worth, all you have to do is count the number of atoms in each molecule
H2SO4 contains 2 hydrogen 1 sulfur 4 oxygen = 7 atoms
H2S contains 2 hydrogen and 1 sulfur = 3 atoms
H3PO4 contains 3 hydrogens 1 phosphorus 4 oxygens = 8 atoms
HNO3 contains 1 hydrogen 1 nitrogen and 3 oxygens = 5 atoms
You have the right answer.
what is full from of DTP
Answer:
Hellloooo
ur answer is
Desktop Publishing.
Explanation:
thanks hope it helps
A student dissolves of sodium hydroxide in of water in a well-insulated open cup. He then observes the temperature of the water rise from to over the course of minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: ()()() You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction.
Is this reaction exothermic, endothermic, or neither?
a. exothermic
b. endothermic
c. neither
Answer: a. exothermic
Explanation:
An Endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.
An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.
When sodium hydroxide is dissolved in water, the temperature of water rise which means the heat has been released during dissolution of sodium hydroxide, thus the reaction is exothermic.
which energy transformation took place?
Answer:
C
Explanation:
The battery is chemical energy. When it is used in the flashlight, it produces light and thermal energy
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