A solution of iron(II) chloride is mixed with an acidified sodium nitrate solution identify the SOA and SRA

Imagine that the reduction of tin(II) ions has been selected as the reference half-cell.

What will be the new reduction potential for the reduction of chromium(II) ions?

Lead can be dangerous when present at just 1ppb (part per billion) in drinking water. An older apartment building finds that 0.1 g of lead has dissolved into the old 1000 L water heater. Is the water safe to drink? Show your work!

4 CH₃NO_{2 +} 3 O_{2 -->} 4 CO₂ + 6 H₂O + 2N₂

What products are produced during the electrolysis of an aqueous solution of nickel(II) bromide?

ANS: Ni(s) + Br(l)

Follow-up questions:

- How do you know when water comes into play and should be selected as an SOA/SRA?

What are the products made in the electrolysis of an aqueous solution of calcium bromide?

ANS: Br(l) + H2(g) + OH-(aq)

Follow-up Q: why would calcium not be included in the reaction when it is the fourth from the bottom on the table of reduction half-reactions (see chem 30 data booklet).

NOTE: may need to Google Chem 30 data booklet for table of reduction half-reactions.

inside a calorimeter, 0.0075g of sodium hydroxide reacts with 100.0 ml of 0.1500 M sulfuric acid. the initial temperature of the resulting 100.01g solution was 19.67 celcius and it reached a peak of 34.06 celcius. calculate the ethalphy change for this neutralization reaction and write a balanced thermochemical equation.