Farmers who raise cotton once used arsenic acid, h₃aso₄, as a defoliant at harvest time. arsenic acid is a polyprotic acid with ka₁ = 2.5 × 10⁻⁴, ka₂ = 5.6 × 10⁻⁸, and ka₃ = 3 × 10⁻¹³. what is the ph of a 0.500 m solution of arsenic acid?

Explanation:

The reaction equation will be as follows.

Hence, the expression for is as follows.

Let us assume that the concentration of both and is x.

                          x = 0.01118034

This means that the concentration of is 0.01118034.

Since, we know that the relation between pH and concentration of hydrogen ions is as follows.

              pH =

                    =

                    = 1.958

Thus, we can conclude that the pH of a 0.500 M solution of arsenic acid is 1.958.

the answer is: they rebelled against saddam hussein’s rule.

kurds opposed saddam rule and wanted independence. kurds in the north and shiites in the south revolt against hussein.

for example, the halabja attack in 1988 conducted against the kurdish people by the iraqi regime under saddam hussein, where between 4000 people are killed and around 9000 are injured.

b. examine and describe cells