Answer:
Explanation:
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In this case, according to the reaction between hypochlorous acid and strontium hydroxide which yields stontium hypochlorite and water as a neutralization reaction:
Thus, since HClO is a weak acid, it is not fully ionized so the complete ionic equation turns out to be:
Whereas the spectator ions, which remain the same at both sides of the equation, are:
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A reaction occurs when HClO and Sr(OH)2 are mixed forming Sr(ClO)2 and H2O. In this reaction there are no spectator ions as all ions participate in the reaction forming new compounds.
When HClO (hypochlorous acid) and Sr(OH)2 (strontium hydroxide) solutions are mixed, a reaction takes place, resulting in the formation of Sr(ClO)2 and H2O. In this reaction, Sr2+ and OH- from Sr(OH)2 and H+ and ClO- from HClO are the ions that participate, therefore there are no spectator ions in the reaction. In the net ionic equation, spectator ions are the ions that remain the same in their ionic form on the both sides of the equation (reactant side and product side), thus, in this case, there are none. It's important to understand the concept of
solubility guidelines
and their use in determining reaction outcomes and recognizing
spectator ions
.
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b. planting replacements
c. clearcutting
d. soil maintenance
Answer:
Explanation:
b. phase change
c. physical change
d. combustive reaction
Sodium is a group 1 element with atomic number 1. It has 11 electrons. It is soft reactive metal. It has 1 valence electron.
Fluorine is a group 7 element, a hologen with 7 valence electron. It is a most reactive non metal.
When sodium react with fluorine, ionic bond is formed in the resulting compound sodium fluoride.
One sodium and fluorine each totaling 2 atoms are enough to make the bond.
As the bond is formed, both atoms have octet structure. That is they each have 8 electrons on their outermost shells.
The positive charge on sodium indicates that sodium had lost 1 electron to fluorine atom.
The negative charge on fluorine ion indicates that fluorine atom had gained 1 electron from sodium atom to form negative ion.
The name of the compound is sodium fluoride with formula NaF.
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b.twice the sum of the pressures that are exerted by the individual gases.
c.the sum of the pressures that each gas would exert if they occupied twice the volume.
d.the sum of the pressures that each gas would exert if they occupied half the volume.
Answer: The correct option is (a).
Explanation:
If two gases are present in a container, the total pressure in the container is equal to the sum of the all the individual pressures exerted by the individual gases in a container.
Individual pressure exerted by the individual gas in a container is called partial pressure of that individual gas.
So, total pressure of gas in container is:
Where = Total pressure exerted by the gases in the container.
= Partial pressure of gas 'a'
= partial pressure of gas 'b'
The answer is a, because the question is referring to partial pressures. Partial pressures are a mere sum, no halving or doubling of anything is necessary.
So, A
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(2) electrical energy, nonspontaneously
(3) nuclear energy, spontaneously
(4) nuclear energy, nonspontaneously
Answer:
(1) electrical energy, spontaneously
Explanation:
Voltaic cells or galvanic cells are electrochemical systems in which electrical energy is produced through spontaneous chemical reactions. Redox (reduction-oxidation reactions) processes forms the basis of voltaic cells.
Oxidation which involves loss of electrons takes place at the anode. These electrons move to the positive cathode where reduction or the gain of electrons takes place. The movement of electrons from the anode to the cathode generates electrical energy. Thus, chemical is spontaneously converted to electrical energy.
In a voltaic cell, chemical energy is converted to electrical energy, spontaneously because the redox reaction that takes place in the cell is spontaneous. So correct option is 1.
(1) electrical energy, spontaneously
A voltaic cell is made up of two half-cells, each of which contains an electrode and an electrolyte. The electrolyte is a substance that conducts electricity, and the electrode is a metal that can either gain or lose electrons.
The two half-cells are connected by a salt bridge, which is a tube filled with a solution that contains ions. The salt bridge allows the ions to move between the two half-cells, which completes the circuit and allows an electric current to flow.
The chemical reaction that takes place in the voltaic cell is a redox reaction. A redox reaction is a reaction in which electrons are transferred from one atom or molecule to another. In the voltaic cell, the electrons are transferred from the electrode in the first half-cell to the electrode in the second half-cell.
The transfer of electrons creates an electric current, which flows from the first half-cell to the second half-cell. The chemical energy of the redox reaction is converted into electrical energy, and the electric current flows until the chemical reaction is complete.
The conversion of chemical energy into electrical energy in a voltaic cell is a spontaneous process. This means that it happens without any outside intervention. The electrons in the cell move from one electrode to another because they are attracted to the oppositely charged electrode.
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