The balance the equation for a half-reaction that occurs in acidic solution is given as,
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The half-reaction method to balance redox reactions in acidic aqueous solutions follows rule.
- Balance elements in the equation other than O and H.
- Balance the oxygen atoms by adding the appropriate number of water opposite side of the equation.
- Balance the hydrogen atoms by adding proton ions ( ion) to the opposite side of the equation
- Add up charge on each side of the equation by adding enough number of electrons to more positive side.
- The on each side must be equal . Multiply by appropriate integers if they are nit equal.
- The half -equation are added together, by cancelling out the electrons to form one balanced equation.
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Answer: It takes 3.120 seconds for the concentration of A to decrease from 0.860 M to 0.260 M.
Explanation:
Integrated rate law for second order kinetics is given by:
k = rate constant =
= initial concentration = 0.860 M
a= concentration left after time t = 0.260 M
Thus it takes 3.120 seconds for the concentration of A to decrease from 0.860 M to 0.260 M.
<u>Answer:</u> The amount of heat released is 462.3 kJ
<u>Explanation:</u>
The chemical equation for the reaction of manganese and oxygen to produce manganese (II,III) oxide follows:
We need to calculate the amount heat released for 1 mole of manganese.
To calculate the amount of heat released, we use unitary method:
When 3 moles of manganese is burnt, the amount of heat released is 1387 kJ
So, when 1 mole of manganese is burnt, the amount of heat released will be =
Hence, the amount of heat released is 462.3 kJ
1. Compared to oxygen, nitrogen's __________ makes it more difficult for water molecules to the surround nitrogen molecules.
<span>2. The high solubility of sulfur dioxide can be explained by its ____________. </span>
<span>3. Nitric oxide is more soluble than nitrogen and oxygen because of its _______________. </span>
<span>4. Compared to nitrogen, the ___________ of ethylene makes it more soluble in water. </span>
<span>CHOICES are: </span>
<span>a. shorter bond length </span>
<span>b. ability to react with water </span>
<span>c. larger molecular size </span>
<span>d. polarity
answers: </span><span>a, b, d, c.</span><span>
</span>
Molecular solids do not ionize into several particles while ionic solids do (to some extent). Since Freezing-point depression is a colligative property, caused by the presence of particles of non-volatile solute (and not on their chemical nature), ionic solids have a multiplicative effect on the change in temperature per unit - i.e. the van't hoff constant, i<span>.
F</span>P depression equation: <span>ΔT=i∗m∗<span>Kb
</span></span>Molecular solids have i=1 always, and ionic solids <span>i≥2.
</span><span>The formula to find the molar mass:
</span>M=<span><span>i∗m∗<span>Kb/</span></span><span>k<span>g <span>solvent</span></span>∗ ΔT</span></span>