In one compartment of a voltaic cell, a graphite electrode dips into an acidic solution of K2Cr2O7and Cr(NO3)3. In The other, a bar of solid tin dips into a Sn(NO3)2 solution. A KNO3 salt bridge joins the two compartments. The tin electrode is negative relative to the graphite. What is the oxidation half-reaction and what is the reduction half-reaction?

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Draw two cyclic constitutional isomers of cis-1

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.