posted by dave .
a large amount of potassium in plant food could cause the formation of MgKPO4:6H2O along with MAPH. what would be the effect on the calculated percentage of P2O5 in question 1 if MAPH were mixed in with your precipitate? would the %P2O5 in this mixture be higher or lower than if your precipitate contained only MAPH?
Since MKPH is insoluble too, it may ppt along with the MAPH. So which weighs more? If all of the ppt was MAPH it would weigh x amount; if all were MKPH it would weigh more. Right? The molar mass MAPH is ? and the molar mass MKPH is ?.