Answer:
Explanation:
A solution with a pH value of 7 is neutral i.e neither acidic nor alkaline. A solution with a pH less than 7 is said to be acidic, while one with a pH value more than 7 is alkaline. Acidity increases as the value decrease below 7, while alkalinity increases as the value increase about 7.
Given that H2A is a diprotic weak acid have pKa values of 5.0 ad 9.0, it will undergo dissociation in the solution as:
NOTE: These reactions are reversible reactions.
Thus;
The primary species is HA⁻
The secondary species is A²⁻
The second one is correct. Alleles on homologous chromosomes determine traits
It might be more suitable because some data cannot use a graph to show data because there is too much data.
No, because you are not changing the chemical make-up of the paper
Answer:
a) 15.2 kJ/g
b) 1367 kJ/mol
Explanation:
<u>Given:</u>
Mass of lactic acid = 0.5865 g
Heat capacity C of calorimeter = 4.812 kJ/C
Initial temperature, T1 = 23.10 C
Final temperature, T2 = 24.95 C
<u>To determine:</u>
Heat of combustion/gram and heat/mole lactic acid
<u>Calculation:</u>
Molar mass of lactic acid = 90.08 g/mol
The heat of combustion is given as:
where C = heat capacity of calorimeter
T1 and T2 are the initial and final temperatures
a) heat of combustion per gram
b) heat of combustion per mole