ID compound from lineup using % composition and gravimetric analysis. To identify unknown sample of salt made from an Alkali cation and chloride anion, you decide to use gravimetric analysis. You dissolve 0.825 g of the salt in water, then add excess lead(II) nitrate. Lead(II) chloride precipitates out. After collecting and drying the solid, you find its mass to be 0.949 g. Which Alkali metal was the cation of the original salt? Hint: this differs from the worked example problem in that after finding percent composition of chlorine of the unknown salt, you must compare it to the percent compositions of all the salts made by pairing an Alkali metal cation with chloride anion. No answer text provided. OLi, lithium Na, sodium OK, potassium O Rb, rubidium Cs, cesium Fr, francium