write the symbols for the ions that form when potassium and iodine react to form the ionic compound potassium iodide.
2 answers:
Answer:
Explanation:
As iodine has a higher electronegativity value and 7 valence electrons, it takes the valence electron of potassium to complete 8 electrons in its valence shell thus forming the anion and, as consequence of losing one electron, the K atoms forms the cation
The formula of potassium iodide is KI
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Answer : The initial rate for a reaction will be
Explanation :
Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.
For the given chemical equation:
Rate law expression for the reaction:
where,
a = order with respect to A
b = order with respect to B
c = order with respect to C
Expression for rate law for first observation:
....(1)
Expression for rate law for second observation:
....(2)
Expression for rate law for third observation:
....(3)
Expression for rate law for fourth observation:
....(4)
Dividing 1 from 2, we get:
Dividing 1 from 3, we get:
Dividing 3 from 4, we get:
Thus, the rate law becomes:
Now, calculating the value of 'k' by using any expression.
Putting values in equation 1, we get:
Now we have to calculate the initial rate for a reaction that starts with 0.75 M of reagent A and 0.90 M of reagents B and C.
Therefore, the initial rate for a reaction will be