determine the percent change in optimum recommended fluoride concentration for water system with annual average maximum daily temperatures of 10.0 to 12.0 celsius the percent change is given by

Phosphorous acid, h3po3(aq) , is a diprotic oxyacid that is an important compound in industry and agriculture. the values of phosphorous acid are 1.30 6.70 calculate the ph for each of the given points in the titration of 50.0 ml of 1.5 m h3po3(aq) with 1.5 m koh(aq) .

Can someone me with 1 to 4 plz. fast

When a septic tank backs up a goes in to clean it out