A sodium ion-selective electrode increased in voltage by 59.16 mV when the sodium cation concentration was increased by a factor of 10. A S2- ion-selective electrode measured a decrease of 29.58 mV when the sulfide concentration increased by a factor of 10. Why

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.