PH của 800 ml dd chứa 0,548 g Ba(OH)2 :
A. 2
B. 12
C. 0,4
D. 13,6

What overall charge must all compounds have

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

What is the oxidation half-reaction for this unbalanced redox equation? cr2o72– + fe2+ → cr3+ + fe3+ cr3+ → cr2o72– cr2o72– → cr3+ fe3+ → fe2+ fe2+ → fe3+?