How would you prove that sodium hydroxide is a base without using litmus paper to test?Give the equation for the reaction.
Answers
Answered by
29
HEYA...
YES WE CAN PROVE IT..
[ with litmus paper]
WHEN WE PLACE LITMUS PAPER IN SODIUM HYDROXIDE AND THE LITMUS PAPER TURNS INTO BLUE COLOUR THEN IT IS A BASE... AND IF IT TURNS INTO RED SODIUM HYDROXIDE WILL BE ACIDIC...
[without litmus paper]
WE CAN DO A REACTION WITH SODIUM HYDROXIDE WHICH WILL PROCEED ONLY IF IT THE pH IS VERY HIGH..
THIS WILL PROVE IT IS A HIGH pH BASE..
THIS IS HOW;
AL2O3 + 2 NaOH -----.> 2Na + 2 [AL (OH) 4]
YES WE CAN PROVE IT..
[ with litmus paper]
WHEN WE PLACE LITMUS PAPER IN SODIUM HYDROXIDE AND THE LITMUS PAPER TURNS INTO BLUE COLOUR THEN IT IS A BASE... AND IF IT TURNS INTO RED SODIUM HYDROXIDE WILL BE ACIDIC...
[without litmus paper]
WE CAN DO A REACTION WITH SODIUM HYDROXIDE WHICH WILL PROCEED ONLY IF IT THE pH IS VERY HIGH..
THIS WILL PROVE IT IS A HIGH pH BASE..
THIS IS HOW;
AL2O3 + 2 NaOH -----.> 2Na + 2 [AL (OH) 4]
Answered by
7
Answer:
You can do a reaction with sodium hydroxide which will proceed only if the pH is very high, proving sodium hydroxide is a high pH base.
This is how:
Al2O3 + 2 NaOH --> 2Na+ + 2[Al(OH)4]-
The species, [Al(OH)4]- is the tetrahydroxoaluminate complex ion. It only appears at high pH. At low pH you cannot get it to form and thus, you will get no further reaction because you cannot dissolve the aluminum oxide coating on the metal. Fortunately, we are using sodium hydroxide and low pH is not even a remote possibility!
Now that you have pure aluminum metal, you can react that with more sodium hydroxide:
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