Some Science questions

[Fashionation]

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1. Can we differenciate Strong / Weak Base/Acid by looking formula? Should I draw structure? Any easy way?

1-2 why CH3ONa strong base while CH3OH Strong Acid?

<orchem>

2. What does spectator ions mean?

<genchem>

3. What does "final hydrogen accepter" mean?

thank you for answering basic questions!

 

[ushaseos]

1) CH3OH is not a strong acid. Alcohol groups have a pKa of about 16, so whatever book is telling you that is lying. Methanol is a very weak acid if anything

2) Spectator ions are those in solution which don't really react Example:

NaCl (aq) + AgNO3(aq) --> Na+(aq) + NO3-(aq) + AgCl (s)

In the above equation, Na and NO3 would be spectator ions since they started aq and ended aq. Ag and Cl- however started aq and ended solid. This is mainly for reactions with salts or Net ionic reactions etc.

3) Depends on the context but I am guessing in Respiration. O2 accepts Hs and becomes water at the end of respiration, so O2 is the final hydrogen acceptor. If context is different please elaborate.

 

[hchc]

There aren't that many Strong bases/acids you can just memorize them, the rest are weak acids/bases at least that's all you really need to know for the DAT. Memorizing these strong acids/bases really helps when comparing acidity if you have Chad's videos there is a video discussing this very topic really helped me out.

 

[Dotoday]

1. Usually strong acids form stable anions. If you can pull off an H from an acid ans generate a stable anion, then you have a strong acid.

2. Spectator ions can be seen in aqueous and net ionic reactions.

3. Oxygen is a final.electron acceptor. You need hydrogens to supply the proton motive force to power up ATP synthase.

Hope this helps.

Sent from my MB855 using Tapatalk

 

[Molarcule]

1)There are tons of weak acids and weak bases.Acids accept protons and Bases donate protons. There are only a handful of strong acids and strong bases. All you need to do is memorize which ones are the strong acid and strong bases.

Strong Acids:
Hydrochloric acid: HCl
Hydrobromic acid: HBr
Hydroiodic acdi: HI
Sulfuric acid: H2SO4
Nitric acid: HNO3
Perchloric acid: HClO4

Strong bases:
Lithium hydroxide: LiOH
Sodium hydroxide: NaOH
Potassium hydroxide: KOH
Rubidium hydroxide: RbOH
Cesium hydroxide: CsOH
Magnesium hydroxide: Mg(OH)2
Calcium hydroxide: Ca(OH)2
Strontium hydroxide: Sr(OH)2
Barium hydroxide: Ba(OH)2

CH3OH is not a strong acid. I believe it is a weak base. CH3O-Na is the conjugate acid of CH3OH which acts as a base (confusing I know).

2) Spectator ions are exactly what it says. They do not partake in the chemical reaction they simply are just there.

3) Final Hydrogen acceptor deal with the electron transport chain. When the electron are pass down the final hydrogen acceptor is O2.

I hope this helps.