Search our library of Chemistry A Level questions

Top answers

Chemistry

A Level

Explain the two assumptions involved in the Ka weak acid dissociation equation.

On the numerator of the Ka equation, the concentration of protons is written as being squared due to the fact the concentration of protons is equal to the concentration of the conjugate base in solution.O...

Answered by Lucas L. • Chemistry tutor

9124 Views

What is a transition metal?

A transition metal is an element that forms one or more stable ions with partially filled d-orbitals

Answered by Laura H. • Chemistry tutor

1840 Views

Explain Optical Isomerism

Optical Isomerism is a type of stereoisomer. The molecule has a chiral centre which is where the are four different atoms attached to the central atom. This means that they become mirror images of each ...

Answered by • Chemistry tutor

1837 Views

A 1000 cm3 container of ammonia (NH3) has a mass of 20.7g, it is stored at room temperature (298 K). When empty the container has a mass of 20.0 g, calculate the pressure inside the container in kPa to an appropriate number of significant figures.

Using PV = nRT, make a note of the information you have, what you can calculate and what you need to find. P <-- need to find thisV = 1000 cm³n <-- can be calculate...

Answered by Natalie B. • Chemistry tutor

1916 Views

Give the IUPAC name of CH3CH2CH2CH2CH(OH)CN

First count the longest chain of carbons (6), therefore hexane.OH group is on the 2nd carbon, therefore 2-hydroxy.CN is a nitrile group.
Put together: 2-hydroxyhexanenitrile.

Answered by Meg P. • Chemistry tutor

6993 Views