Question 21 What is the fundamental difference between covalent and ionic bondin

Question

Question 21

What is the fundamental difference between covalent and ionic bonding?

Question 22

Which of the following statements regarding the oxygen atom of a water molecule is true?

Question 23

In a water molecule, hydrogen and oxygen are held together by a ________ bond.

Question 24

The hydrogen atoms of a water molecule are bonded to the oxygen atom by ________ bonds, whereas neighboring water molecules are held together by ________ bonds.

Question 25

Which of the following statements regarding chemical reactions is false?

Question 26

The tendency of water molecules to stick together is referred to as

Question 27

As ice melts

Question 28

A solution with a pH of 7 is

Question 29

Compared to a solution of pH 3, a solution of pH 1 is

Question 30

Which of the following statements about pH is true?

In a covalent bond, the partners share a pair of electrons; in an ionic bond, one partner accepts electrons from the other.

Explanation / Answer

Ans21:

? In a covalent bond, the partners share a pair of electrons; in an ionic bond, one partner accepts electrons from the other.

--- covalent bond forms between any two atoms which have similar electronegativity and ionic bond forms between atoms with opposite electronegativity. Covalent bond involves sharing of electron, whereas ionic involves transfer of electrons.

Ans 22-

? Oxygen is more electronegative than the hydrogen atoms.

Ans23:

In water, oxygen and hydrogen are bound covalently.

? polar covalent bond.

Ans24:

The hydrogen atoms of a water molecule are bonded to the oxygen atom by ____polar covalent____ bonds, whereas neighboring water molecules are held together by ___hydrogen_____ bonds.

? polar covalent; hydrogen.

Ans 25:

? Some chemical reactions create electrons; others destroy them.

Ans26:

Water molecule stick each other by cohesion and stick to other surfaces by adhesion.

? cohesion

Ans27:

As ice melts

? hydrogen bonds are broken.

Ans 28:

pH 7 is

? neutral

Ans29:

A solution of pH 1 is 100timea more acidic than pH 3 solution.

?100 times more acidic.

Ans 30:

? An increase in hydrogen ion concentration means a decrease in pH scale units.

(Please upvote!)

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