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Chemistry
IB

There are three halogenoalkanes with halogens F, Br and I. Each undergo an SN2 reaction. How does the rate of reaction differ between the three halogenoalkanes?

The Iodoalkane will have the fastest rate of reaction. The Bromoalkane will have the second fastest, while the Floroalkane will have the slowest. This is because the atomic radius increases from Florine t...

Answered by Rosalie G. Chemistry tutor
2151 Views

Why is there a significant difference between the radii of first and second row transition metals, where as no difference (or even a decrease) is observed between the second and third rows?

The answer stems from the lanthanide (or lanthanoid) contraction. In more detail, there is a steady decrease in the radii of atoms from Lanthanum through to Lutetium, despite the associated increase in th...

Answered by Ioannis B. Chemistry tutor
1663 Views

Define and then compare the periodic table trends (atomic radius, electronegativity, ionization energy, electron affinity) for Lithium (Li) and Sodium (Na).

The Atomic radius of an atom represents its atomic size. More specifically, it refers to the half-distance between the two nuclei of two adjacent atoms of the same element. In the periodic table, across a...

Answered by Danai Athina I. Chemistry tutor
15357 Views

Use the following information: [[[[2H2(g) + O2(g) → 2H2O(l) ∆H = −572 kJ mol−1]]]] [[[[2H2(g) + O2(g) → 2H2O(g) ∆H = −484 kJ mol−1]]]] to calculate the enthalpy change for the process: H2O(g) → H2O(l)

Well the method I use for calculations in thermochemistry is a little different from the textbooks but is far easier to understand. 

I would approach this question by drawing out the chemical equat...

Answered by Louis B. Chemistry tutor
6940 Views

What is an acid-base titration?

A titration is way to find an unknown concentration of a sample through a chemical reaction. 
The most common titration involves an acid and base to react. In order to set our experiment a s...

Answered by Giovanni Z. Chemistry tutor
1558 Views

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