According to the arrhenius theory an acid is a substance that
Answers
The Arrhenius theory established that acids and some bases: dissociate giving rise to ions.
What is the Arrhenius theory?
Arrhenius's theory was a theory of acids and bases formulated on the basis of his theory of ionization of substances in aqueous solutions.
Principles of the Arrhenius theory
- Acid substances are those that dissociate into hydrogen ions in aqueous solution.
- Basic substances are those that dissociate into hydroxyl ions in aqueous solution.
Therefore, we can conclude that the Arrhenius theory explains that the characteristic properties of aqueous solutions of acids are due to hydrogen ions.
Learn more about the Arrhenius theory here: brainly.com/question/3920636
Answer:
According to the theory, an Arrhenius acid is a substance that gives hydrogen ion, (or protons) as the only positively charged ions, when dissociated in water.
Explanation:
What this means is that acids increase the concentration of protons in water to form hydronium ions,as opposed to the idea that there aren't free hydrogen cations floating around in aqueous solution.
The Arrhenius definitions of acidity and alkalinity are restricted to aqueous solutions and refer to the concentration of dissolved ions.
Related Questions
A person with a body temperature of 37°C holds an ice cube with a temperature of 0°C in a room where the air temperature is 20.°C. The direction of heat flow is(1) from the person to the ice, only(2) from the person to the ice and air, and from the air to the ice(3) from the ice to the person, only(4) from the ice to the person and air, and from the air to the person
How many total atoms are in 0.380 g of P2O5
Density is a measure of mass divided by volume weight divided by area volume divided by weight mass divided by area
Explain the cause of the daily tides and give two examples of human activities affected by tides.
The reactants are at a higher potential energy compared to the products.
The reactants are at a lower potential energy compared to the products.
There will not be an activation energy barrier.
Answers
Answer : The correct option is, The reactants are at a higher potential energy compared to the products.
Explanation :
Exothermic reaction means energy is released and the overall enthalpy change is negative.
In exothermic reaction, the reactants are at a higher potential energy compared to the products. In other words, we can say that the products are more stable than the reactants.
My reason being is because the reactants tend to gather "hyper" energy which is also known as potential energy and this will occur as shown in the answer as an Exothermic Reaction.
I really hope that this helps you out a lot. Have a nice day :)
b)They have different numbers of neutrons and different charges.
c)They have different numbers of protons and different mass numbers.
d)They have different numbers of neutrons and different mass numbers.
Answers
the number of protons in the atom is called the atomic number. the atomic number is characteristic of the element.
the mass number is the sum of the number of protons and neutrons. Since protons and neutrons both have similar masses and they are located in the nucleus, the mass of the atom is the sum of protons and neutrons.
Isotopes are when 2 atoms of the same element have different number of neutrons. Therefore atomic number is the same but mass number is different as the number of neutrons vary.
correct answer for the difference between isotopes is
d)They have different numbers of neutrons and different mass numbers.
Boron occurs naturally as two isotopes that is they have the same number of protons and different numbers of neutrons with different atomic charges. Option D is correct.
What are isotopes?
These are the variations of elements having the same number of protons and electrons and different numbers of neutrons. As they are neutral in charge and their mass is totally negligible as compared to the mass of proton as they both are located at the center of the atom
The center of the atom is the nucleusas there are some more species of element isobars isotones isoelectronic. Isobars are those species that have the same neutronic numbers with different photonic and electronic numbers
The isotopes of boron are boron10, boron12, boron14, etc. .Carbon is another compound that is having 3 isotopes carbon12 carbon13, and caobon14. But mostly their properties are the same with a little difference between them
Therefore, the correct option is D.
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6.11
4.94
5.65 - this one is correct
Answers
Answer:
5.65 is the pH.
Explanation:
I am assuming that you are asking for confirmation on your answer. The answer is 5.65.
You would do:
[pOH] = -log[OH-]
= -log[4.5*10^-9]
equals about 8.3468
To find pH your would subtract the pOH from 14.
14-8.3468 = 5.65 << Rounded to match the answer choices.
lithium atom
potassium atom
sodium atom
Answers
The atoms having partially filled shells have orbitals with electrons half or less than the number of electrons that can be accomodated in it. The atom which has a partially filled second electron shell in the ground state is lithium.
What is lithium?
Lithium is 3rd element in periodic table and thus having 3 electrons in it. The main shell electronic configuration of lithium is written as K=2, L=1. Thus the second shell L has only one electron and it is said to be partially filled.
The element hydrogen is having only one electron located in the K shell and it have o more shells which are filled.
The elements sodium and potassium are first group elements sodium with 11 electrons and potassium atom with 19 electrons. Both are having 3 main shells and one electron in the last shell. Thus their second shell is completely filled.
Hence, the atom which have partially filled second electron shell in the ground state among the following is lithium. Thus, option B is correct.
To find more about lithium, refer the link below;
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1. H - hydrogen atom has one electron in the First energy shell. Therefore hydrogen has a partially filled first energy shell
2.Li - Li electron configuration is 2,1
The outermost energy shell is the second energy shell in which there is only one electron
Therefore the second energy shell is partially filled. This is the correct answer
3. K - electron configuration is 2,8,8,1
The outermost energy shell is the fourth energy shell which is partially filled. The second energy shell is completely filled
4.Na - electron configuration is 2,8,1
The outermost energy shell is the third energy shell which is partially filled
Second energy shell is completely filled
From the given options Li is the only element with a partially filled second energy shell
Answer is Li
Answers
Answer:the standard reduction potential (E°red) for the reduction half-reaction of Pb^4+(aq) to Pb^2+(aq) is 1.50 V.
Explanation:The given chemical reaction is:
Pb^4+(aq) + 2 Ce^3+(aq) -> Pb^2+(aq) + 2 Ce^4+(aq)
The standard cell potential (E°cell) for this electrochemical reaction is 0.06 V.
The standard cell potential for a galvanic cell can be calculated using the Nernst equation:
E°cell = E°cathode - E°anode
In this reaction, Pb^4+(aq) is being reduced to Pb^2+(aq), so it is the reduction half-reaction, and Ce^3+(aq) is being oxidized to Ce^4+(aq), so it is the oxidation half-reaction.
The standard reduction potentials (E°) for the half-reactions are as follows:
For the reduction half-reaction:
Pb^4+(aq) + 2 e^- -> Pb^2+(aq) E°red = x (we'll solve for x)
For the oxidation half-reaction:
2 Ce^3+(aq) -> 2 Ce^4+(aq) + 2 e^- E°red = 1.44 V (This value is usually given)
Now, plug these values into the Nernst equation:
E°cell = E°cathode - E°anode
0.06 V = x - 1.44 V
Now, solve for x:
x = 0.06 V + 1.44 V
x = 1.50 V
So, the standard reduction potential (E°red) for the reduction half-reaction of Pb^4+(aq) to Pb^2+(aq) is 1.50 V.
Answers
Answer: Mixture: Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze
Pure substance: Copper wire, distilled water, table salt, oxygen.
Explanation:
Mixture is a substance which is made up two or more number of compounds which chemically inactive and retain their distinct chemical properties.
Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze
Pure substance is defined as anything with uniform and unchanging composition is known s pure substance.
Copper wire, distilled water, table salt, oxygen.