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Chemistry
A Level

How do you calculate the pH of a weak acid?

Lets say we have 0.89 mol dm-3 of CH3COOH, a weak acid, with a ka of 1.7X10^-5.We want to find Ph, but to do this we first need to know [H+] because PH = -log10[H+].Because CH3COOH is a weak acid, it only...

Answered by Amy H. Chemistry tutor
10678 Views

What's the difference between covalent and ionic bonding?

Covalent bonding happens when two molecules share a pair of electrons. For example in hydrogen chloride (HCl). Ionic bonding is when two oppositely charged ions are attracted to each other to form a la...

Answered by Isobel S. Chemistry tutor
1708 Views

State in terms of its bonding why benzene is more stable than cyclohexa-1,3,5-triene:

Due to the delocalisation of electrons in the benzene ring conferring more stability on the structure.

Answered by Rishitha J. Chemistry tutor
12376 Views

Which molecule has the highest boiling point: methane, ammonia, water or hydrogen fluoride? Explain why.

Answer: water, followed by hydrogen fluroide, ammonia and lowest is methane.

Explanation: First it helps to write the molecular formulae of these molecules and know their shape:

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Answered by Peter W. Chemistry tutor
68811 Views

Describe and explain the trend in reactivity of Group 2 elements with chlorine as the group is descended?

As group 2 in the periodic table comprises of metals, the reactivity of group 2 elements towards chlorine increases when working our way down the group 2 metals. This is compared to non-metals when the...

Answered by Silvia K. Chemistry tutor
27904 Views

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