lsc04361

i know the half eqt for it when it is acidic. but would anybody like to tell me the one when it is alkaline? which one is a stronger O.A.? and one more question, while we are using the half eqt to make up the whole ionic eqt, sometimes we will cancel out the element which exist in both side i.e. 3A+ 6P ---> 3A+5Y but does it mean that it doesn't require in the reaction? thank you