The question is incomplete; the complete question is;
Why will the conjugate base of a weak acid affect pH? Select the correct answer below: O it will react with hydroxide
O it will react with water
O it will react with hydronium
O none of the above Content attribution
Answer:
O it will react with hydronium
Explanation:
If we have a weak acid HA, the weak acid ionizes as follows;
HA(aq) ----> H^+(aq) + A^-(aq)
A^- is the conjugate base of the weak acid.
H^+ interacts with water to form the hydronium ion as follows;
H^+(aq) + H2O(l) ----> H3O^+(aq)
The pH=[H3O^+]
But the conjugate base of the weak acid reacts with this hydronium ion thereby affecting its concentration and the pH of the system as follows;
A^-(aq) + H3O^+(aq) ------> HA(aq) + H2O(l)
1
8
1
2
Covalent
6
Inner
Sorry don’t understand the last question
H2(g) +C2H4(g)→C2H6(g)
H-H +H2C =CH2→H3C-Ch3
2C -H bonds and one C-C bond are formed while enthalpy change (dH) of the reaction,
H-H: 432kJ/mol
C=C: 614kJ/mol
C-C: 413 kJ/mol
C-C: 347 kJ/mol
dH is equal to sum of the energies released during the formation of new bonds or negative sign, and sum of energies required to break old bonds or positive sign.
The bond which breaks energy is positive.
432+614 =1046kJ/mol
Formation of bond energy is negative
2(413) + 347 = 1173 kJ/mol
dH reaction is -1173 + 1046 =-127kJ/mol
Answer: Double displacement reaction
Explanation:
Double displacement reaction is defined as the reaction where exchange of ions takes place.
The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
The chemical reaction between aqueous magnesium sulfate and aqueous sodium carbonate is represented as:
