`A.` CTHH của các base:

- Fe (II): Fe(OH)2

- Zn: Zn(OH)2

- Pb(I): Pb(OH)2

- Hg(II): Hg(OH)2

- Al: Al(OH)3

- Ca: Ca(OH)2

- Na: NaOH

`B`. NaOH và Ca(OH)2 là các base tan.

Fe (II), Zn, Pb(I), Hg(II) và Al đều là các base không tan.

`C`. Tên các base:

- Fe(OH)2: Sắt(II) Hydroxide

- Zn(OH)2: Kẽm Hydroxide

- Pb(OH)2: Chì(II) Hydroxide

- Hg(OH)2: Thủy ngân(II) Hydroxide

- Al(OH)3:Nhôm Hydroxide

- Ca(OH)2: Canxi Hydroxide (base tan)

- NaOH: Natri Hydroxide (base tan)

Đáp án:

a,

CTHH các base:

$Fe(OH)_2$

$Zn(OH)_2$

$PbOH$

$Hg(OH)_2$

$Al(OH)_3$

$Ca(OH)_2$ 

$NaOH$

b,

Base tan: $Ca(OH)_2, NaOH$

Base không tan: $Fe(OH)_2$, $Zn(OH)_2$, $PbOH, Hg(OH)_2, Al(OH)_3$ 

c, 

$Fe(OH)_2$: ferrous hydroxide hoặc iron(II) hydroxide 

$Zn(OH)_2$: zinc hydroxide

$PbOH$: lead(I) hydroxide 

$Hg(OH)_2$: mercury(II) hydroxide

$Al(OH)_3$: aluminium hydroxide 

$Ca(OH)_2$: calcium hydroxide 

$NaOH$: sodium hydroxide