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Which of the following is a base (APEX)HI (hydroiodic acid)Ca(OH)2 (calcium hydroxide)H2CO3 (carbonic acid)HNO3 (nitric acid)?
Jimmy Dean
Ca(OH)2 (calcium hydroxide) (Apex)
Jimmy Dean
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What is the formula of an antacid tablet reacting with stomach acid?
Answermainly HClIt is gastric acid, which can be neutralised by sodium hydrogencarbonate. Therefore it can be said that it is mainly composed of hydrochloric acid.
Which is the most strongest acid?
Corrected: pKa i.s.o. pHStrongest Acid: hexa-Fluoro-Antimonic Acid (HSbF6 or HF.SbF5), pKa = -25 Classified as a "Superacid". This acid will donate proton to C2H4 to form a ethane-carbocation. Compare: pKa(HClO4) = -10, HClO4 does not react with ethene.Strongest Base: Lithium Diisopropylamide [(CH3)2CH]2NLi ; pKb of 22. Classified as a "Superbase"; based upon greater than the alkalinity of pure NaOH (Sodium hydroxide, but LiOH is even stronger)Added: (s.o.a.)pH is a measure (or result) of the 'strength' (Ka) AND concentration [molarity] of an acid. But there is a limit to concentration of acid in water (solubility) AND the concentration of free (acidic) protons in water. That's why pH will never be much lower than -1.0 (proton concentration greater than 10.0 M rather impossible).Addendum: Although LDA is certainly a strong base, I wouldn't call it the strongest. Sodium amide, for example, has a pKa of 38, compared to 36 for LDA. Grignard reagents have even higher pKas, somewhere around 45, and there are likely stronger bases beyond that. Bear in mind, though, that these only apply to non-aqueous solutions; in water, the strongest acid which will exist is hydronium (H3O+), and the strongest base is hydroxide (HO-).
List of all the acids?
There are many acids, so a list of them all would be incredibly long and likely of little use. However, here is a list the 7 acids my textbook deems strong:HCl hydrochloric acidHBr hydrobromic acidHI hydroiodic acidHClO3 chloric acidHClO4 perchloric acidHNO3 nitric acidH2SO4 sulfuric acid
Which compound names end in ate?
Compound names that end in -ate contain oxygen.Ionic CompoundsCaCO3 contains the carbonate ion, CO32-, and is called calcium carbonate.KNO3 contains the nitrate ion, NO3-, and is called potassium carbonate.Na3PO4 contains the phosphate ion, PO43-, and is called potassium phosphate.MgCrO4 contains the chromate ion, CrO42-, and is called potassium chromate.CaSO4 contains the sulfate ion, SO42-, and is called calcium sulfate.Acids containing oxygenH2CO3 is carbonic acidHNO3 is nitric acidH3PO4 is phosphoric acidH2CrO4 is chromic acidH2SO4 is sulfuric acid
What is the formula of an antacid tablet reacting with stomach acid?
Answermainly HClIt is gastric acid, which can be neutralised by sodium hydrogencarbonate. Therefore it can be said that it is mainly composed of hydrochloric acid.
What are strong acids and strong bases?
The STRONG ACIDS (all dissociate completely in water) are:Hydrochloric acid: HClHydrobromic acid: HBrHydroiodic acdi: HIsulfuric acid: H2SO4 (See note no.3 at the end of this page)Nitric acid: HNO3Perchloric acid: HClO4Some other acids that are sometimes considered strong are:chloric acid (HClO3), bromic acid (HBrO3), perbromic acid (HBrO4), iodic acid (HIO3), and per-iodic acid (HIO4).The STRONG BASES (all dissociate completely in water) are:Lithium hydroxide: LiOHSodium hydroxide: NaOHPotassium hydroxide: KOHRubidium hydroxide: RbOHCesium hydroxide: CsOHMagnesium hydroxide: Mg(OH)2Calcium hydroxide: Ca(OH)2Strontium hydroxide: Sr(OH)2Barium hydroxide: Ba(OH)2Notes:In fact OH- by itself is the only strong base in water.The strong bases with 2 OH- groups, release BOTH when added to water, and so the concentration of OH- in solution is twice the concentration of the added base.In constrast, although sulfuric acid (H2SO4) has two H+(= 2 protons), only ONE proton is completely dissociated when added to water. The second proton contributes to a lesser degree to the acidity of a sulfuric acid solution, than the first. (See also message no.2 on the discussion page for more nuance on this).
Which is the most strongest acid?
Corrected: pKa i.s.o. pHStrongest Acid: hexa-Fluoro-Antimonic Acid (HSbF6 or HF.SbF5), pKa = -25 Classified as a "Superacid". This acid will donate proton to C2H4 to form a ethane-carbocation. Compare: pKa(HClO4) = -10, HClO4 does not react with ethene.Strongest Base: Lithium Diisopropylamide [(CH3)2CH]2NLi ; pKb of 22. Classified as a "Superbase"; based upon greater than the alkalinity of pure NaOH (Sodium hydroxide, but LiOH is even stronger)Added: (s.o.a.)pH is a measure (or result) of the 'strength' (Ka) AND concentration [molarity] of an acid. But there is a limit to concentration of acid in water (solubility) AND the concentration of free (acidic) protons in water. That's why pH will never be much lower than -1.0 (proton concentration greater than 10.0 M rather impossible).Addendum: Although LDA is certainly a strong base, I wouldn't call it the strongest. Sodium amide, for example, has a pKa of 38, compared to 36 for LDA. Grignard reagents have even higher pKas, somewhere around 45, and there are likely stronger bases beyond that. Bear in mind, though, that these only apply to non-aqueous solutions; in water, the strongest acid which will exist is hydronium (H3O+), and the strongest base is hydroxide (HO-).
