Chapter 7, The Group IA and IIA Metals Video Solutions, Descriptive Inorganic Chemistry

Problem 1

Write complete, balanced equations to show the reactions of the following with water.
(a) $\mathrm{NaH}$
(b) $\mathrm{Li}_2 \mathrm{O}$
(c) $\mathrm{CaO}$
(d) $\mathrm{K}_2 \mathrm{~S}$
(e) $\mathrm{Mg}_3 \mathrm{~N}_2$

Matthew Glaub

Numerade Educator

01:00

Problem 2

Consider the reaction of sodium hydride in water. Describe what happens in terms of a Lewis acid-base reaction.

Arpit Gupta

Numerade Educator

02:47

Problem 3

Write complete, balanced equations to show the reactions of the following with water.
(a) $\mathrm{NaNH}_2$
(b) $\mathrm{CaC}_2$
(c) $\mathrm{Mg}_3 \mathrm{P}_2$
(d) $\mathrm{Na}_2 \mathrm{O}_2$
(e) $\mathrm{NaOC}_2 \mathrm{H}_5$

Bhumika Jayee

Numerade Educator

01:55

Problem 4

Explain why it would be much more difficult to obtain a compound containing $\mathrm{Mg}^{2+}$ and $\mathrm{Mg}^{2-}$ than one containing $\mathrm{Na}^{+}$and $\mathrm{Na}^{-}$.

Arpit Gupta

Numerade Educator

02:16

Problem 5

Complete and balance the following.
(a) $\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}+\mathrm{Na} \rightarrow$
(b) $\mathrm{Na}_2 \mathrm{O}_2+\mathrm{CO} \rightarrow$
(c) $\mathrm{NaHCO}_3 \stackrel{\text { heat }}{\longrightarrow}$
(d) $\mathrm{KO}_2+\mathrm{H}_2 \mathrm{O} \rightarrow$
(e) $\mathrm{MgCl}_2+\mathrm{NaOH} \rightarrow$

Ronald Prasad

Numerade Educator

02:14

Problem 6

Use the data shown in Tables 3.1 through 3.3 to calculate the lattice energy for $\mathrm{KBr}$. If the heats of hydration of $\mathrm{K}^{+}(g)$ and $\mathrm{Br}^{-}(g)$ are -322 and $-304 \mathrm{~kJ} \mathrm{~mol}^{-1}$, respectively, and $\Delta \mathrm{H}_{\text {vap }}$ of $\mathrm{Br}_2$ is $30 \mathrm{~kJ} \mathrm{~mol}^{-1}$, calculate the heat of solution of $\mathrm{KBr}(s)$ in water.

Charles Thomas

Numerade Educator

00:56

Problem 7

Although the formation of $\mathrm{MgCl}$ from the elements would be accompanied by a release of energy, $\mathrm{MgCl}_2$ is the stable compound. Explain why $\mathrm{MgCl}$ is not a stable compound.

Lottie Adams

Numerade Educator

06:41

Problem 8

Write complete equations for the following processes.
(a) The preparation of calcium hydride
(b) The use of calcium hydride as a drying agent
(c) The reaction between ethanol and butyl lithium
(d) The preparation of lithium aluminum hydride
(e) The preparation of beryllium metal by reduction (not by electrolysis)

Jennifer Hudspeth

Numerade Educator

02:19

Problem 9

Complete and balance the following.
(a) $\mathrm{SrO}+\mathrm{TiO}_2 \rightarrow$
(b) $\mathrm{Ba}+\mathrm{H}_2 \mathrm{O} \rightarrow$
(c) $\mathrm{Ba}+\mathrm{O}_2 \rightarrow$
(d) $\mathrm{CaF}_2+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow$
(e) $\mathrm{CaCl}_2+\mathrm{Al} \rightarrow$

Nicholas Mogoi

Numerade Educator

03:06

Problem 10

Explain why $\mathrm{CP}_2{ }^{2-}$ would be expected to be less stable than $\mathrm{CN}_2{ }^{2-}$.

Km Neeraj

Numerade Educator

01:03

Problem 11

Describe the results of molecular weight studies on methyllithium, and draw the basic structure of the molecule.

David Collins

Numerade Educator

00:36

Problem 12

Describe the structures and bonding in gaseous, liquid, and solid beryllium chloride.

Lottie Adams

Numerade Educator

00:51

Problem 13

Complete and balance the following.
(a) $\mathrm{LiC}_2 \mathrm{H}_5+\mathrm{PBr}_3 \rightarrow$
(b) $\mathrm{CH}_3 \mathrm{MgBr}+\mathrm{SiCl}_4 \rightarrow$
(c) $\mathrm{NaC}_6 \mathrm{H}_5+\mathrm{GeCl}_4 \rightarrow$
(d) $\mathrm{LiC}_4 \mathrm{H}_9+\mathrm{CH}_3 \mathrm{COCl} \rightarrow$
(e) $\mathrm{Mg}\left(\mathrm{C}_5 \mathrm{H}_5\right)_2+\mathrm{MnCl}_2 \rightarrow$

David Collins

Numerade Educator

10:16

Problem 14

Write complete equations for the following processes.
(a) The preparation of butyl lithium
(b) The reaction of butyl lithium with water
(c) Dissolving of beryllium in sodium hydroxide
(d) Preparation of phenyl sodium
(e) Reaction between ethanol and lithium hydride

Emily Harris

Numerade Educator

03:29

Problem 15

Molten beryllium chloride is not a good conductor of electricity, but when $\mathrm{NaCl}$ is dissolved in it, the solution becomes a good conductor. Write the appropriate equations and explain this observation.

Sidharth Anand

Numerade Educator

01:15

Problem 16

In general, complexes of $\mathrm{Be}^{2+}$ are more stable than those of the heavier members of Group IIA. Explain this observation.

Aadit Sharma

Numerade Educator

02:44

Problem 17

The reaction of lithium with an alkyl halide that takes place in an inert solvent can be shown as
$$
\mathrm{Li}+\mathrm{RX} \rightarrow \mathrm{LiR}+\mathrm{LiX}
$$
Why would a reaction such as this be expected to take place readily?

Vishal Sharma

Numerade Educator