What is the maximum concentration of iodide ions that will precipitate agi but not pbi2?

Which of the following signs of a chemical reaction are observed in the reaction of potassium with water? precipitate formed temperature change smell produced gas produced color change

0.09 moles of sodium sulfate in 12 ml of solution

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine