based on your suggestions I just I decide to run some more tests on the water sample I took from Westfield as it turns out you were right the reaction between iron pipes and fertilizer seems to have produced another substance besides rust I hadn't noticed it before because it dissolved into the water once I remove the substance from the solution I was able to observe some of its properties the unknown substance is a solid yellow powder at room temperature has no orderbased on these observations I was able to narrow down the list of possible stuff substances which of those that share all these properties I think that the substance is either sodium nitrate or potassiumchromate I'd like you to determine which of these substance is the unknown substance in Westfield water I'm sending one along the atomics scale model each of the substance for you to use as evidence once you've identified the substance be sure to inform the people of Westfield