Which of the following compounds will form an acidic aqueous solution?

Question

a. CO2
b. CaO
c. Mg(OH)2
d. NaBr
e. NaCH3CO2

Answer 1

a. CO2 forms carbonic acid in water (H2CO3)

Answer 2

This demands the calculation of pH of buffer answer for B) and C) . because of the fact which you have equimolar concentrations of the acid and its conjugate base , the pH will equivalent the pKa of the acid: n B) pKa CH3COOH = 4.seventy 4 pKa HNO2 = 3.4 D) is the salt of a vulnerable acid and robust base , so the pH would be approx 10.0. That leaves A) and C) you have considered that HNO2 has a decrease pKa than CH3COOH - so at equivalent molarity the HNO2 answer is extra acidic The score , from lowest to optimal pH is: a million) A) 0.10M HNO2 2) E) 0.10M CH3COOH 3) C) 0.10 M HNO2 and nil.10 M NaNO2 4) B) 0.10 M CH3COOH and nil.10 M CH3COONa 5) D) 0.10 M CH3COONa

Answer 3

CO2. It is a gas that will dissolve in water to form H2CO3 (carbonic acid, also called 'soda water').

All the other compounds will form basic solutions.

Answer 4

CO2 will form trioxocarbonate(V)acid when it react with water.such compounds form an acidic solution when they react with water are said to be an acid anhydride or acid former

Answer 5

c