1. Pretest: Unit 3 Question 14 of 29 You burn a log on a fire. You use the fire to warm yourself and to light up the room to read a book. Which energy transformation is taking place? O A. Chemical energy is transformed to light energy and thermal energy B. Thermal energy is transformed to light energy and chemical energy O C. Nuclear energy is transformed to potential energy and thermal energy O D. Chemical energy is transformed to nuclear energy and thermal energy. ​

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.