ZrO(OH)2 + 4KHF2 → K2[ZrF6] + 2KF + 3H2O
Zirconium(IV) dihydroxide-oxide react with potassium hydrofluoride to produce hexafluorozirconate(IV) potassium, potassium fluoride water. Potassium hydrofluoride - concentrated solution. This reaction takes place at a temperature near 0°C.