Question

question 3. select the correct name for each compound below:
a) nahco₃
b) fe(no₃)₃
c) mn(clo₄)₂
d) k₃po₄

Explanation:

Part a) $\boldsymbol{NaHCO_3}$ (Sodium Bicarbonate)

Step1: Identify Cation and Anion

Cation: $\text{Na}^+$ (Sodium ion). Anion: $\text{HCO}_3^-$ (Bicarbonate ion, also called Hydrogen Carbonate ion).

Step2: Name the Compound

For ionic compounds, name the cation first, then the anion. So, combining them: Sodium Bicarbonate (or Sodium Hydrogen Carbonate).

Part b) $\boldsymbol{Fe(NO_3)_3}$ (Iron(III) Nitrate)

Step1: Identify Ions

Cation: $\text{Fe}^{3+}$ (Iron(III) ion, since nitrate is $-1$ and there are 3 nitrates, so Fe has $+3$ charge). Anion: $\text{NO}_3^-$ (Nitrate ion).

Step2: Name the Compound

Name cation (with charge indicated by Roman numeral) + anion. So: Iron(III) Nitrate.

Part c) $\boldsymbol{Mn(ClO_4)_2}$ (Manganese(II) Perchlorate)

Step1: Determine Charges

Anion: $\text{ClO}_4^-$ (Perchlorate ion, $-1$ charge). There are 2 perchlorates, so total negative charge is $2 \times (-1) = -2$. Thus, cation $\text{Mn}^{2+}$ (Manganese(II) ion, to balance charge).

Step2: Name the Compound

Cation (with Roman numeral for charge) + anion. So: Manganese(II) Perchlorate.

Part d) $\boldsymbol{K_3PO_4}$ (Potassium Phosphate)

Answer:

s:
a) Sodium Bicarbonate (or Sodium Hydrogen Carbonate)
b) Iron(III) Nitrate
c) Manganese(II) Perchlorate
d) Potassium Phosphate