Practice Questions 2 Flashcards
If a student added copper metal to colourless silver nitrate solution and observed:
pale grey crystals forming and
the solution turning blue
how does this show silver is less reactive than copper
The grey crystals are silver,the copper ions produced are blue this is because copper displaces silver
What is coppers reaction to hydrochloric acid
No reaction shown by no bubbles
What is the difference in reaction to hydrochloric acid with magnesium and iron
Magnesium bubbles faster than iron
What variables could you control in reacting metals with hydrochloric acid
Volume of acid
Same temperature of acid each time
Same mass of metal each time
If comparing metals reaction to hydrochloric acid what would you compare
Temperature change
Compare rate of bubbling
02.4 the calculating relative atomic mass question,what is the working out and answer
100
This equals 204.4
03.1 conservation of mas question
The mass of products equals the mass of reactants,meaning no atoms were lost or made
How could a student separate the insoluble silver iodide from the mixture at the end of the reaction
Filtration
What would you get rid of if you rinse silver iodide
Sodium nitrate
Why would a student warm the silver iodide after rinsing
To dry the silver iodide
03.5 atom economy question,what is the working out and answer
Total Mr =170+150=320
Atom economy=235/320 X 100
Answer:73.4
Why are reactions with high atom economy used in industry
To reduce waste
