139. $2KOH$ + $CO_{2}$ → $K_{2}CO_{3}$ + $H_{2}O$
140. $2KOH$ + $SO_{2}$ → $K_{2}SO_{3}$ + $H_{2}O$
141. $2KOH$ + $SO_{3}$ → $K_{2}SO_{4}$ + $H_{2}O$
142. $2NaOH$ + $CO_{2}$ → $Na_{2}CO_{3}$ + $H_{2}O$
143. $2NaOH$ + $SO_{2}$ → $Na_{2}SO_{3}$ + $H_{2}O$
144. $2NaOH$ + $SO_{3}$ → $Na_{2}SO_{4}$ + $H_{2}O$
145. $Ba(OH)_{2}$ + $CO_{2}$ → $BaCO_{3}$↓ + $H_{2}O$
146. $Ba(OH)_{2}$ + $SO_{2}$ → $BaSO_{3}$↓ + $H_{2}O$
147. $Ba(OH)_{2}$ + $SO_{3}$ → $BaSO_{4}$↓ + $H_{2}O$
HOK TỐT!
