Angiosperms what dose this mean pls help

Write a net ionic equation to show that hydrofluoric acid, behaves as an acid in water.

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

What is the name of the enzyme that forms at the start of transcription?