Calculate the concentration of all species in a 0.540 MM solution of H2SO3H2SO3. The acid ionization constants for the acid are Ka1=1.6×10−2Ka1=1.6×10−2 and Ka2=6.4×10−8Ka2=6.4×10−8 .

The answer for #3 is c but i don't know why

Answer asap need to be answered 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.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver