The Lewis structures of four compounds are given. In the first molecule sufur is the central atom. There are two oxygen atoms bo
nded to the sulfur atom through double bonds. There is one lone pair of electrons on the sulfur atom and two lone pairs of electrons on each oxygen atom. In the second molecule carbon is the central atom. There are two oxygen atoms bonded to the sulfur atom through double bonds. There are two lone pairs of electrons on each oxygen atom. In the third molecule carbon is the central atom. There are two chlorine atoms and two hydrogen atoms bonded to the carbon atom through single bonds. Each chlorine atom contains three lone pairs of electrons. In the four molecule phosphorus is the central atom. There are three chlorine atoms bonded to the phosphorus atom through single bonds. There is one lone pair of electrons on the phosphorus atom and three lone pairs of electrons on each chlorine atom. Which of these molecules are polar?
1 answer:
Answer:
Compound 1. Sulfur Dioxide
Compound 3. Dichloromethane
Compound 4. Phosphorus Trichloride
<em>(figure attached)</em>
Explanation:
Compound 1. Sulfur Dioxide
Polar compound
Through the Lewis structure it is confirmed that SO₂ is a polar compound, because it is an asymmetric compound having two regions of different polarity. The lower region having oxygen groups is more electronegative then the upper region.
Compound 2. Carbon Dioxide
Non polar Compound
Through the Lewis structure it is confirmed that CO₂ is a non polar compound, because it is a symmetric compound having two regions of same polarity. The left region and the right region both contains oxygen groups having same electronegativity.
Compound 3. Dichloromethane
Polar compound
Through the Lewis structure it is confirmed that CH₂Cl₂ is a polar compound, because it is an asymmetric compound having two regions of different polarity. Two chlorine atoms are attached to it and as we know that chlorine is a more electronegative element than hydrogen so it attracts the bonding pair of electrons towards itself which creates polarity.
Compound 4. Phosphorus Trichloride
Through the Lewis structure it is confirmed that PCl₃ is a polar compound, because three chlorine atoms attached to it and as we know that chlorine is a more electronegative element so it attracts the bonding pair of electrons towards itself which creates polarity.
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Answer: Yes, the solute is a weak electrolyte
Explanation:
Depression in freezing point is given by:
= Depression in freezing point
i= vant hoff factor = ?
= freezing point constant =
m= molality
As i for non electrolytes is 1, the given compound must be an electrolyte and a weak electrolyte as the value is only slightly greater than 1.
Answer:
120.575 kJ is the activation energy for the souring process.
Explanation:
The formula for an activation energy is given as:
where,
= rate constant at
=
= rate constant at
=
= activation energy for the reaction = ?
R = gas constant = 8.314 J/mole.K
= initial temperature =
= final temperature =
Now put all the given values in this formula, we get:l
120.575 kJ is the activation energy for the souring process.