C6 Flash cards

What is made at the cathode during copper electrolysis?

What is made at the anode during copper electrolysis?

During copper electrolysis...
the cathode gets heavier/lighter
the anode gets heavier/lighter

Why doesn't CuSO4 (aq) change during copper electrolysis?

What is electrolysis?

Can solids do electrolysis and why/why not?

What is formed at the cathode and anode during the electrolysis of sodium hydroxide?

Metals are discharged at cathode/anode
Non-metals are discharged at cathode/anode

Why are fuel cells used in spacecraft?

How do fuel cells produce water?

Why is the quality of no moving parts in a fuel cell good?

Why is it important that the fuel cells work at low temperature?

What do fuel cells do?

4 advantages for using fuel cells in cars

When does a positive ion produce hydrogen and when does it just produce the metal?

When does a negative ion produce hydroxide(to make oxygen) and when does it just produce the non-metal?

Name 5 advantages of using fuel cells

What are two half equations for what happens at the anode and cathode when sodium hydroxide solution and sulfuric acid react?

What are the 2 disadvantages of using fuel cells?

What is the overall equation for a hydrogen oxygen fuel cell?

The anode equation in a hydrogen oxygen fuel cell is...

The cathode equation in a hydrogen oxygen fuel cell is...

What is the sort of reaction where it involves both reduction and oxidation?

What's an example of a redox reaction?

How can you protect iron from rusting? Why does this work?

What is the oxidising agent when iron rusts?

How does oxygen work as an oxidising agent for rusting?

Are positive ions metals or non metals?

Why can't an ionic solid not be electrolysed?

Why is recharging fuel cells counted as electrolysis?

How do you know if a reaction is a redox reaction?

What happens in a displacement reaction?

How does displacement work?

What's the word equation for making ethanol through fermentation?

What's the balanced symbol equation for making ethanol through fermentation?

What does the process of fermentation involve?

What is the general formula for alcohols?

Why is making ethanol to use as a fuel renewable?

why is producing ethanol from ethane non-renewable?

What is the reaction to make ethanol from ethane called?

What is the word equation for the hydration of ethane?

What conditions are needed for hydration?

What is the balanced symbol equation for the hydration of ethene?

Fermentation/hydration has a high/low atom economy and yield

Why were chlorofluorocarbons thought to be a great discovery?

What discoveries have scientists made about the CFCs?

What can CFCs be replaced with?

What are the 3 main steps in chlorine depleting the ozone?

How is the radical formed in CFCs?

What are the equations for how CFCs work?

Do the chlorine radicals ever stop?

how is hard water formed?

How is it temporary hard water formed? What is the word and symbol equation for this?

Can permanent hardness be removed by boiling?

What is permanent hardness caused by?

Can temporary hardness be removed by boiling?

How do you remove permanent hard water?

How do you remove temporary hard water?

What does heating do to temporary hardness?

How does ion exchange work to remove water hardness?

Why is hard water so bad?

What types of chemicals are fats & oils?

Do saturated fats have single or double covalent bonds?

Why are saturated fats bad for you?

What do unsaturated compounds that react with bromine water produce?

How is margarine made?

Is the head of an emulsifier hydrophilic or hydrophobic?

What's an example of a water in oil emulsion?

What's an example of an oil in water emulsion?

Why are emulsions formed?

What is saponification?

What is the name of the saponification reaction?

What are the reactants and reaction conditions for saponification?

What is the word equation for saponification?

Why is it good to wash at low temperatures?

What are detergents a type of?

How do detergent molecules remove the stain?

Why is dry cleaning different to normal cleaning?

Why can detergents remove grease stains but normal water can't?

How does biological washing powder work?