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Topics: Logarithm

Experimentally Determining of the Order of a Chemical Reaction

Experimentally Determining of the Order of a Chemical Reaction

Subject: Chemistry
The rate of a chemical reaction depends upon the rate constant and the concentrations of the reagents and products each raised to a power, the powers are called the order with respect to that compound.…
Experimental Arrhenius Plot: Mathematical Example

Experimental Arrhenius Plot: Mathematical Example

Subject: Chemistry
k = Ae-(Ea/RT) Firstly, using the following experimental data for the rate constants and temperatures draw a graph of ln(k/s-1) versus (1/T) x (103 K) the reciprocal of the pure number obtained by dividing the…
What is Radioactive Decay?

What is Radioactive Decay?

Subject: Chemistry
Radioactive decay is a first-order chemical reaction which follows an exponential decay in the reactant, the radioactive element. Starting with an original number of radioactive atoms n0 at time zero, the number of radioactive atoms…
How Chemical Work at Constant Pressure?

How Chemical Work at Constant Pressure?

Subject: Chemistry
Chemical Work at Constant Pressure The ability of a chemical reaction to perform work at a constant pressure is given by the Gibbs energy AG° where K is the equilibrium constant. ΔG0 = – RT…
Explain Nernst Equation

Explain Nernst Equation

Subject: Chemistry
The following redox chemical reaction Zn(s) + Cu2+ → Zn2+ +Cu(s) can be made into an electrochemical cell to derive electrical energy, below Figure. The cell is called the Daniell cell and was the power…
Explain Arrhenius Equation

Explain Arrhenius Equation

Subject: Chemistry
Question 1: The rate constant k of a chemical reaction increases with the absolute temperature T. This increase follows the equation below which is called the Arrhenius equation.     k = Ae-(Ea/RT) Where Ea is…
First Order Kinetics: Mathematical Example

First Order Kinetics: Mathematical Example

Subject: Chemistry
Question 1: The concentration of the reactant in a first-order chemical reaction decreases with time as it is consumed to form products and the concentration of [A] varies with time as follows [A] = [A]0…
Explain Acid Base Equilibrium

Explain Acid Base Equilibrium

Subject: Chemistry
Question 1: The molar concentration of OH– ions in a certain solution is 1.04 x 10-5 mol L-1. Calculate the pOH and then the pH of the solution. Question 2: Death occurs if the pH of human…
What is Logarithm?

What is Logarithm?

Subject: Mathematics
bc = a,   b must be greater than 1 then c = logb (a) We say that c is the logarithm to the base b of a. Here are two examples which are familiar from…

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