posted by LALA .
TestubeA: KMnO4 + H2S04 + NaHSO3---->MnSO4+ K2SO4+Na2SO4 (colourless solution)
a) if test tube a wasn't acidic enough, what colour might you expect in the products.
Acidic solutions of KMnO4 are reduced to Mn(II). Neutral or basic solution of KMnO4 are reduced to MnO2. Mn(II) solution are faint pink, MnO2 is a brown solid. In solution this often is mixed with MnO(OH)2, also dark brown.