Knowledge Tree
Relations (1)
related 4.39 — strongly supporting 17 facts
Ammonia is frequently compared to water as a potential alternative biological solvent due to their shared polar nature and cosmic abundance [1], [2], [3]. They exhibit chemical analogies in their ionization behavior, such as the formation of ammonium/hydronium ions [4] and amide/hydroxide anions [5], and they interact directly when ammonia acts as a base in water [6] or water acts as an acid in ammonia [7].
Facts (17)
Sources
Hypothetical types of biochemistry - Wikipedia en.wikipedia.org 14 facts
claimAmmonia is a potential alternative solvent to water for life because it is a polar molecule and is cosmically abundant.
claimAmmonia is a stronger nucleophile than water, being more inclined to accept an H+ ion and less inclined to donate one.
claimAmmonia and ammonia–water mixtures remain liquid at temperatures far below the freezing point of pure water, making them potentially suitable for life on planets and moons outside the water-based habitability zone, such as under the surface of Saturn's moon Titan.
claimAmmonia has weaker hydrogen bonds than water, resulting in a heat of vaporization half that of water and a surface tension one-third that of water, which reduces its ability to concentrate non-polar molecules through a hydrophobic effect.
claimAmmonia functions as an Arrhenius base when added to water, increasing the concentration of the hydroxide anion.
claimHydrogen fluoride forms hydrogen bonds with neighboring molecules, similar to water and ammonia.
claimAmmonia is a stronger nucleophile than water, as it is more inclined to accept an H+ ion and less inclined to donate one.
claimHydrogen fluoride is cosmically rare compared to water, ammonia, and methane.
claimAmmonia functions as an Arrhenius base when added to water, increasing the concentration of the hydroxide anion.
claimAmmonia (NH3) forms the amide anion (NH2−) when it donates an H+ ion, which is analogous to the hydroxide anion (OH−) formed by water.
claimScientists debate the effectiveness of methane and other hydrocarbons as a solvent for life compared to water or ammonia.
claimAmmonia can accept or donate an H+ ion, and when it accepts an H+, it forms the ammonium cation (NH4+), which is analogous to the hydronium ion (H3O+) formed by water.
claimAmmonia is a hypothetical alternative to water as a biological solvent because it is a polar molecule and is cosmically abundant.
measurementAmmonia has weaker hydrogen bonds than water, resulting in a heat of vaporization half that of water and a surface tension one-third that of water, which reduces its ability to concentrate non-polar molecules through a hydrophobic effect.
Beyond Carbon-Based Life: Exploring Alternative Biochemistries in ... walshmedicalmedia.com 2 facts
Does Life Need to Be Carbon-Based? - Reasons to Believe reasons.org 1 fact
measurementAt 60 atm of pressure, ammonia is liquid over a similar temperature range as water at normal pressure.