is nash a strong base?
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Or how are you suppsed to know that NaSH is a stong nucleophile but a weak base? ... The base strength is related to the thermodynamic stability of the conjugate base.
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Ammonia is a Lewis base, accepting proton to form ammonium ion as it has tendency to donate an electron pair. Hence it has a high proton affinity and C is correct answer.
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A larger pKa for the conjugate acid indicates a stronger base. For indicating base strength directly we use pKb, in which case a smaller value is more basic.
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If one of the ions is OH-, the solution is basic. An example of a strong base is sodium hydroxide (NaOH). There are other ions that make acidic and basic solutions, but we won't be talking about them here.
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NaCN (sodium cyanide) is made from a strong base NaOH and weak acid HCN so it is a strong base.
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NH4+ is acidic according to Bronsted-Lowry Theory because it can give away one proton to other species (like water or hydroxide ion). However, it is neither acidic nor basic according to Lewis Theory because it doesn't have any room to receive electron pairs and doesn't have any lone electron pairs ti donate.
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The more stable the base, the stronger is its conjugate acid. 14. a. ... NH3; H30+ is a stronger acid than +NH4 because oxygen is more electronegative than nitrogen; the stronger the acid, the weaker its conjugate base.
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HBrO is a weak acid, so BrO– is a weak base, but not very weak.
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If you see any other acid or base than one of these strong ones it will be a weak acid or base (unless I specifically say otherwise in the problem). The 7 common strong acids are: HCl, HBr, HI, HNO3, HClO3, HClO4 and H2SO4 (1st proton only).
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Ca(OH)2 is a strong base. A strong base is something like sodium hydroxide or potassium hydroxide which is fully ionic. You can think of the compound as being 100% split up into metal ions and hydroxide ions in solution.
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I believe if we apply the analogy of conjugate bases to acids as well we can see that weak acids are indeed more stable than strong acids since they are less likely to donate a proton, hence they're more stable in the sense that they're more "comfortable" with the proton configuration that they're in - Just like a more ...
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No, it can't be generalised. Amongst the haloacids, only HF is weak. Acid strength can be determined by the stability of the conjugate base (for most acids, the conjugate base is what you get when you remove H+ from the acid). ... HCl,HBr,HI are all strong acids.
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NH4+ and NH3. Hi. Normally the conjugate acid of a weak base is a strong acid, however, the conjugate acid of the weak base NH3 is a weak acid, NH4+.
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So if you see NaCN, KOCH3, and so on, these count as strong nucleophiles too. Weak nucleophiles are neutral and don't bear a charge. Some examples are CH3OH, H2O, and CH3SH. ... Example 1 uses NaCN (a strong nucleophile).
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a. Since NaOCH3 is a strong nucleophile and base, it will force a 2nd-order mechanism. It is not a bulky base, so the 2° alkyl halide will give a mixture of E2 and SN2 products.
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Strong acids and bases are less stable than weak acids and bases because they are more reactive. ... A weak base is resistive to being protonated because it is stable. A strong base is going to accept a proton easily because it's less stable.
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The more stable the conjugate base, the stronger the acid. A very strong acid has a very weak conjugate base and a very weak acid has a very strong conjugate base.