The pressure P2 at the temperature which CO2 gets solidifies is 0.857 atm.
<u>Explanation:</u>
The relation between temperature T and the pressure P is that it is proportional to each other.
T ∝ P
As the temperature decreases, the pressure also decreases which is given by
T1 / T2 = P1 / P2
At the triple point of water, the temperature equals 273 K.
Consider T1 = 273 K, P1 = 1.20 atm
The temperature T2 of the CO2 solidifies equals 195 K
(273 / 195) = (1.20 / P2)
P2 = (195 x 1.20) / 273
P2 = 0.857 atm.
The pressure P2 at the temperature which CO2 gets solidifies is 0.857 atm.
The compounds that can be formed by using only the cations and anions found in the item above are as follows: (1) Ca3(CO2)2, Na3CO2, NaOH, Ca(OH)2
The last two in the given are in aqueous phase. We are then left with the first two choices. Ca3(CO2)2 is exhibits a phase that is in solid form.
Hence, the answer to the question is Ca3(CO2)2
In Fisher esterification, sulfuric acid is used as a catalyst and its function is to convert the carboxylic compound in its conjugate acid. This favours the nucleophilic attack of the alcohol. To act as a catalyst you need a strong acid, therefore sulphuric acid is suitable for this kind of reaction.