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Describe a test that could be used to distinguish between potassium sulfate (K2SO4) and potassium nitrate (KNO3)

Add a solution containing Barium ions (eg BaCl2, Ba(OH)2, etc)K2SO4 will form white precipitate KNO3 will have no visible change
IW
Answered by Isobel W. • Chemistry tutor
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An aldehyde CH3CH2CH2CHO reacts with potassium cyanide (KCN) to form a racemic mixture of two stereoisomers of CH3CH2CH2CH(OH)CN. A)Explain why a racemic mixture is formed and b)describe how you would distinguish between 2 samples of the stereoisomers

A) The aldehyde contains a planar carbon group which can be attacked from both sides. Each side has equal probability of being attacked resulting in a racemic compound containing equal amounts of each stereo...
IW
Answered by Isobel W. • Chemistry tutor
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How to compare and contrast the authors of one text with another when writing an essay.

This is a standard A Level essay question which is asked across multiple exam boards with an ultimate theme that the student must write about. It is also a good question to work through with students as it e...
OD
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Escribe una carta de presentacion para solicitar un trabajo en un museo de arte.

Muy Sres. Míos: Me dirijo a ustedes con relación al anuncio que vi en su sitio web con respecto a una oportunidad para prácticas y pasantías como anfitrión en el Museo de Arte.Actualmente soy una estudiante ...
JR
Answered by Juliet R. • Spanish tutor
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Define x and y if 3x+y=11 and 5x-2y=11

This is a simultaneous equations question. In this situation the equations can be multiplied to create a common coefficient: 3x+y=11 therefore 6x+2y=22You can then add the equations together: 6x+2y=22 plus 5...
JM
Answered by Jonathan M. • Maths tutor
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