Bonding

Question 1

Why can ionic compounds conduct electricity when dissolved in water but not as a solid?

Answer 1

When dissolved in water, ions are free to move around and carry a charge, while as a solid are in fixed positions

Question 2

Why do ionic compounds have high melting points?

Answer 2

Giant ionic lattices held together by strong electrostatic forces of attraction. These forces take lots of energy to overcome

Question 2

Why do ionic compounds dissolve in water?

Answer 2

Water molecules are polar. The permanent dipoles in water pull apart ions in the lattice structure.

Question 2

2 bond pairs - Shape name and bond angles

Answer 2

Linear and 180°

Question 2

What is a dative covalent bond?

Answer 2

A bond that forms when a bonding pair is created, but the electron pair is only supplied by one atom as a lone pair of electrons.

Question 3

3 bond pairs - Shape name and bond angles

Answer 3

Trigonal planar and 120°

Question 4

4 bond pairs - Shape name and bond angles

Answer 4

Tetrahedral and 109.5°

Question 5

5 bond pairs - Shape name and bond angles

Answer 5

Trigonal bipyramidal and 120° and 90°

Question 6

6 bond pairs - Shape name and bond angles

Answer 6

Octahedral and 90°

Question 7

When 1 lone pair subtract…

Answer 7

2.5°

Question 8

When 2 lone pairs subtract…

Answer 8

5°

Question 9

3 bond pairs and 1 lone pair - Shape name and bond angles

Answer 9

Trigonal pyramidal and 107°

Question 10

2 bond pairs and 2 lone pairs - Shape name and bond angles

Answer 10

Bent shape and 104.5°