A dye known as bromothymol blue appears yellow under some conditions and blue under others, as shown in the following equation

HB(aq) <--> H+(aq) + B-(aq)

yellow_blue

Which chemical would contribute a common ion if added to this system?

CaCl2

NaF

H2SO4

K2SO4

Which statement justifies that hydrogen peroxide (h2o2) is a polar molecule? the o – h bond is nonpolar and the molecule is asymmetric. the o – h bond is nonpolar and the molecule is symmetric. the o – h bond is polar and the molecule is asymmetric. the o – h bond is polar and the molecule is symmetric.