What minimum frequency of light is required to ionize potassium?The energy required to ionize potassium is 419kJ/mol? Chemistry The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10-19 J.
This video shows how to remove black mastic or carpet glue of concrete floor using FranMar's Bean-e-doo mastic remover. This is an easy and safe way to remove black mastic without toxic fumes. for more information visit www.sealgreen.com.1  Howto & Style. 2  Standard YouTube License.his video shows how to remove black mastic or carpet glue of concrete floor using FranMar's Bean-e-doo mastic remover. This is an easy and safe way to remove black mastic without toxic fumes. for more information visit www.sealgreen.com. 1  Howto & Style. 2  Standard YouTube License.
Method 3 of 4: Use a commercial cleaner to remove rust from cement. 1. Use a cleaner that obtains oxalic acid such as Singerman's or F9 BARC. Avoid products that contain Hydrochloric acid as these acids will dissolve the top paste layer in the concrete and leave a permanent etch mark.ow to Remove Rust from Cement. Four Methods: Use lemon juice to remove rust from cement. Use vinegar to remove rust from cement. Use a commercial cleaner to remove rust from cement. Use Trisodium Phosphate (TSP) to remove rust from cement.