This solution contains equal concentrations of both hf(aq) and naf(aq). write the proton transfer equilibrium (net ionic) reaction that includes f– as a reactant. include states of matter.

We are asked to provide the net ionic equation for the reaction of HF (aq) and NaF (aq). HF is a weak acid and is in the following equilibrium:

HF (aq) ⇄ H⁺ (aq) + F⁻ (aq)

Meanwhile, NaF (aq) is an ionic compound that will dissociate completely in aqueous solutions:

NaF (aq) → Na⁺ (aq) + F⁻ (aq)

We can combine the ionic species with HF, as we are told to show F⁻ as a reactant:

HF (aq) + Na⁺ (aq) + F⁻ (aq) → HF (aq) + Na⁺ (aq) + F⁻ (aq)

We can eliminate the spectator ions, which in this case are Na⁺ ions, and this leaves us with the net ionic equation involving F⁻:

HF (aq) + F⁻ (aq) → HF (aq) + F⁻ (aq)

In this instance, the proton is just transferred between F⁻ ions and the end result is the formation of more HF, so there is no net reaction taking place.

Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.