Answer:
Here's what I get.
Explanation:
(a) The buffer equilibrium
The equation for the buffer equilibrium is

(b) Addition of acid
If you add a strong acid like HNO₃, you are increasing the concentration of hydronium ion.
Per Le Châtelier's Principle, the system will respond in such a way as to decrease the concentration of hydronium ion.
The position of equilibrium will shift to the left.
(c) Addition of base.
If you add a strong base like KOH, The hydroxide ions will react with the hydronium ions to form water.
The concentration of hydronium ions will decrease.
Per Le Châtelier's Principle, the system will respond in such a way as to increase the concentration of hydronium ions.
The position of equilibrium will shift to the right.
Answer: 
Explanation:
General representation of an element is given as: 
where,
Z represents Atomic number
A represents Mass number
X represents the symbol of an element
Beta decay : In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

The given reaction would be represented as:

Given mass of tungsten, W = 415 g
Molar mass of tungsten, W = 183.85 g/mol
Calculating moles of tungsten from mass and molar mass:

Answer:
The equations are
1) 
2) 
Explanation:
There are two ionization steps in the dissociation of hydroselenic acid.
In first dissociation the H₂Se loses one proton and forms hydrogen selenide ion as shown below:

The next step is again removal of a proton from the base formed above.
