Chemistry 1

Pregunta	Respuesta
Write down the displayed formula for a molecule with the molecular formula C3H8	Image: ef4cb878-e392-4146-b79f-2bb8043f3a0a (image/png)
Define the word 'hydrophobic'	The tail of the emulsifier which bonds to oil molecules
What is an emulsifier?	Emulsifiers help to stop the two liquids in an emulsion from separating out e.g, oil and water
What is the equation for making an ester?	Acid + Alcohol = Ester + Water
Which types of paint are water based?	Emulsion Paints
Why don't we eat uncooked potatoes?	Because they contain cellulose that humans cant digest. Cooking the potatoes breaks down the cellulose
True or False: In a fractionating column, the shortest hydrocarbons leave at the bottom	False, the shorter they are, the higher up they leave
What is cracking for?	Helps us get more of the oil that is in demand by taking a long chain alkanes into small chain alkanes and alkenes.
Which part of the emulsifier molecule is hydrophilic?	The head
Name 3 properties which a perfume needs to have	1 non toxic 2 easily evaporates 3 doesn't react with water 4 doesn't irritate the skin 5 insoluble in water
What is a solution?	Mixture of a solute and a solvent that does not separate out
What is a solute?	Is the substance being dissolved
What does soluble mean?	It can be dissolved
What do phosphorescent pigments in paints do?	Glow in the dark, they absorb the light then store it and release it over a period of time

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	Creado por Kerris Linney hace alrededor de 9 años