Question

What is the concentration of K+\rm K^+ ions in a 0.045 M~M K2CO3\rm K_2CO_3 solution assuming complete dissociation?

Answer 1

The concentrati on of K CO is 0.045 M It means 0.045 mol K2COg is present in 1L of the soluti on. The ionization of K2CO3 in water is as follows: K,CO,(aq)-→ 2 K. (aq) +CO32-(aq) From the reaction, 1 mol K,CO3 produces 2 mol K* ions The number of moles of K formed from 0.045 mol K2CO, is calculated as follows: 0.045 mol K2CO3x Therefore, the number of moles of K+ fromed from 0.045 MK CO is 0.090 mol × 2 mol K = 0.090 mol K+ mol K2CO3