A sample of pure tin metal (which forms Sn 2+ nitrate. that would be present at the equivalence point. ions) is added to 200 mL of a 1.5 M solution of copper (II) a. Identify and write out both the oxidation and reduction half reactions (2 pts) b. Use the balanced half reaction equations to determine the overall net ionic equation for the reaction. (1 pt) c. Identify any spectator ions in the reaction (1 pt) d. Determine the maximum mass of copper metal that can be collected after the reaction if the tin metal has a mass of 30.0 g. (1 pt)

What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? view available hint(s) what type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? salt bridge disulfide bridge hydrogen bond hydrophobic interaction

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.

Which subatance is not soluble in water