H positive-is found in bases\nOH negative-is found in acids\nH2O-is a water molecule
204865
almost...H2O is indeed water.  However, H+ is a cation found in acids (NOT bases).  And OH-  is an anion found in bases (NOT acids).
493072
1) b)\n\n2) [H2O]^2 / 2[H2] [O2]\n  \n   [NO]^2 / [N2] [O2]\n\n3) b)\n\n4) b)
339718
B and C.  Molecules with H bonded to N, O, or F can form hydrogen bonds.  Others cannot.  In molecules A and D, all the H's are bonded to C's, so they are not capable of hydrogen bonding.  In molecules B and C, there is an O-H bond, so they are capable of hydrogen bonding.\n\nAlthough all four structural formulas have H written next to O, that doesn't necessarily indicate that there is an O-H bond.\n\nMolecule A is an ether, so the oxygen is between two carbons.  Specifically, it's dimethyl ether, so there's a methyl group (CH3) on each side of the oxygen.  You can find a picture of it here: http://en.wikipedia.org/wiki/Dimethyl_ether\nThe oxygen in an ether doesn't allow for hydrogen bonding because none of the hydrogens are attached to it.\n\nMolecule B a carboxylic acid.  Specifically, it's acetic acid.  It consists of a methyl group attached to a carboxyl group, which is a carbon double bonded to an oxygen and also single bonded to an OH group.  The O-H bond in the carboxyl group allows the molecule to form hydrogen bonds.\nYou can find a picture of its structure here:\nhttp://en.wikipedia.org/wiki/Acetic_acid\n\nMolecule C is ethanol.  It consists of a methyl group, a methylene group (CH2), and an OH groupl.  Like with carboxylic acid, the O-H bond is capable of hydrogen bonding.\nHere's it's structure:\nhttp://en.wikipedia.org/wiki/Ethanol\n\nMolecule D might be a bit misleading at first glance, but it's actually an aldehyde, specifically acetaldehyde.  It consists of a methyl group bonded to a second carbon that is bonded to a hydrogen and double-bonded to an oxygen.  That last hydrogen is attached to the carbon, rather than the oxygen, so it can't do hydrogen bonding.  Here's a picture of it's structure:\nhttp://en.wikipedia.org/wiki/Acetylaldehyde
655346
number of moles of hydrogen is 0.2\n\namount of water is 2.4
256468
OH- is an alkali (pH is more than 7) and H+ is an acid (pH is less than 7).\n\nAcid + Alkali -> Neutrality\n\nSince it's neutral, water (pH 7) is produced.\n\nHope my explanation helped c",)
379619
if a soln is acidic it will be the OH anions which will be less.....for a soln 2 b acidic it has to hav H- ions...............
423198
First of all, basic solutions contain more Hydroxide ions OH- than hydronium ions H3O+ (also known as H+)\n\nAny substances that when dissolved (ionized) in water and produces OH- ions are basic: NaOH becoes Na+ and OH-. NaOH is thus basic\n\nWe know that only weak bases/acids will produce a salt through neutralization which will affect the pH of the solution. For example, the conjugate acid of NH3 is NH4+. NH4+ can react will H2O to form NH3 and H3O+. Therefor, the solution will be more acidic. So we can conclude that positve charged ion can make the solution more acidic and negatively charged ions will make the solution more basic.\n\nHope this helps.
644168
There are a lot of sites that have info.  Search for "formula writing polyatomic ions".\nIf you have a list of polyatomic ions like "SO4", "SO3", "PO4", etc. you will see that they have specific charges associated with them.  SO4 and SO3 both have a negative 2 charge.  Hydrogen has a +1 charge.  A compound must be neutral so you need 2 H to pair with one SO4.  +2-2=0.\nPO4 has a negative 3 charge, so you'd need 3 H+ to offset the 3 negatives.  H3PO4.\n\nAs far as naming them, search for "naming chemical compounds"  The examples you are asking about are actually acids, so you might need to look up "naming acids".
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A\n\nThe pOH of a solution is the negative log of the concentration of OH ions.  THis would be 9 in this case.  The pOH is the opposite of pH.  The scale is from 0 - 14.  The lower the pOH, the more basic the solution is.  pOH of 7 is neutral.  Lower than 7 is basic and higher than 7 is acidic.  If the pOH of a solution is 9,  the pH of the solution is 5.  The pOH and the pH should add up to be 14.  I hope this helps.
665031
pH is a measure of the activity of hydrogen ions (H+) in a solution and, therefore, its acidity or alkalinity. For dilute solutions, however, it is convenient to substitute the activity of the hydrogen ions with the molarity (mol/L) of the hydrogen ions (however, this is not necessarily accurate at higher concentrations [1] [2]).\n\nIn aqueous systems, the hydrogen ion activity is dictated by the dissociation constant of water (Kw = 1.011 × 10−14 M2 at 25 °C) and interactions with other ions in solution. Due to this dissociation constant a neutral solution (hydrogen ion activity equals hydroxide ion activity) has a pH of approximately 7. Aqueous solutions with pH values lower than 7 are considered acidic, while pH values higher than 7 are considered alkaline.\n\nThe concept was introduced by S.P.L. Sørensen in 1909, and is purported to mean "pondus hydrogenii" in Latin.[3] However, most other sources attribute the name to the French term pouvoir hydrogène. [4] [5] [6] In English, pH can stand for "hydrogen power,"[4] [5] [6] "power of hydrogen," [7] [8] or "potential of hydrogen."[3] [9] [10] All of these terms are technically correct.\nThough a pH value has no unit, it is not an arbitrary scale; the number arises from a definition based on the activity of hydrogen ions in the solution.\n\nThe precise formula for calculating pH is:\n\n \naH+ denotes the activity of H+ ions, and is unitless.\n\nIn dilute solutions (such as tap water), the activity is approximately equal to the numeric value of the concentration of the H+ ion, denoted as [H+] (or more accurately written, [H3O+]), measured in moles per litre (also known as molarity). Therefore, it is often convenient to define pH as:\n\n \nFor both definitions, log10 denotes the base-10 logarithm, therefore pH defines a logarithmic scale of acidity. The straight bars, indicating absolute value, make pH a unit-less quantity. For example, if one makes a lemonade with a H+ concentration of 0.0050 moles per litre, its pH would be:\n\n \n \nA solution of pH = 8.2 will have an [H+] concentration of 10−8.2 mol/L, or about 6.31 × 10−9 mol/L. Thus, its hydrogen activity aH+ is around 6.31 × 10-9. A solution with an [H+] concentration of 4.5 × 10−4 mol/L will have a pH value of 3.35.\n\nIn solution at 25 °C, a pH of 7 indicates neutrality (i.e. the pH of pure water) because water naturally dissociates into H+ and OH− ions with equal concentrations of 1×10−7 mol/L. A lower pH value (for example pH 3) indicates increasing strength of acidity, and a higher pH value (for example pH 11) indicates increasing strength of alkalinity. Note, however, that pure water, when exposed to the atmosphere, will take in carbon dioxide, some of which reacts with water to form carbonic acid and H+, thereby lowering the pH to about 5.7.\n\nNeutral pH 25 °C at is not exactly 7. pH is an experimental value, so it has an associated error. Since the dissociation constant of water is (1.011±0.005)×1014, pH of water at 25 °C would be 6.998±0.001. The value is consistent, however, with neutral pH being 7.00 to two significant figures, which is near enough for most people to assume that it is exactly 7. The pH of water gets smaller with higher temperatures. For example, at 50 °C, pH of water is 6.55±0.01. This means that a diluted solution is neutral at 50 °C when its pH is around 6.55 and that a pH of 7.00 is basic.\n\nMost substances have a pH in the range 0 to 14, although extremely acidic or extremely basic substances may have pH less than 0 or greater than 14. An example is acid mine runoff, with a molar concentration of 3981 M and a pH = -3.6.\nThe Grand Peptide Families\nThese peptides are ribosomal peptides, usually with hormonal activity. All of these peptides are synthesized by cells as longer "propeptides" or "proproteins" and truncated prior to exiting the cell. They are released into the bloodstream where they perform
311371
Di-hydrogen oxide would be the chemical name of water. H2O is the chemical formula. The are many ways a person could draw a physical model of it. Now there are other chemicals and ions that only contain hydrogen and oxygen. There is Hydrogen peroxide as an example of a chemical. There are hydroxide ions HO- and oxonium ions H3O+. There is a limit to how many chemicals can be derived by both Hydrogen and oxygen because Hydrogen can only bond to one atom at a time, and Oxygen can only bond to two atoms at a time. Although that would in theory allow an oxygen chain that could have a hydrogen atom on each end with the exception of hydrogen peroxide H2O2, this does not occur. Species with only oxygen. An oxygen atom O it seldom ever found in nature for electronic reasons. An oxygen diatomic molecule O2 is the most abundant form of pure oxygen in the atmosphere. Ozone O3 is not particularly stable it is usually made by free radical chain reaction, but then tries to react with whatever it can. H atomic Hydrogen seldom ever found in nature. Diatomic hydrogen molecule H2 is the most abundant species in the universe, but somewhat rare on earth. Hydrogen H+ ion can exist, but in water it is the short hand for writing H3O+ which I referred to earlier.
528418
Mainly H-bonding (intermolecular forces)
487280
NaOH ® Na+ + OH- is sodium hydroxide, a common base.\nWater has equal hydronium and hydroxide ion and is thus neutral as is C2H5OCOOH ® H+ + C2H5OCO O- which is in chemical equilibria and C2H5OH is ethanol that might have a slight alkalinity but is not considered a base.
623657
There are different grades of polarity.  Polarity is hard to tell by simply looking at a molecule, since there is a lot of spooky stuff happening at the quantum level.  Some polar molecules are more polar than others.  If you have an -OH group in an organic molecule (polar) then you have a somewhat polar molecule.  Not as polar as say, water.  Water is extremely polar.  Polar molecules include\n\nNaCl (salt), H2O (water)\n\nNon-polar molecules include\n\nCl2 (chlorine gas), H2 (natural hydrogen), O2 (atmospheric oxygen)\n\nHowever some molecules you would expect to be extremely polar based on oxidation states are NOT, like HCl (hydrochloric acid)  where the Cl shares electrons with its hydrogen neighbor.  So generally by looking at a molecule you can't really tell.  But there are some guidelines.\n\n1.  Diatomic bonds (as found in naturally occuring oxygen, nitrogren, etc, i.e. O2, N2) are non-polar.\n2.  Organic molecules are generally non-polar (there are exceptions:  some soaps, ketones, alcohols, organic salts)\n3.  Non-organic salts are polar\n4.  An alcohols polarity DECREASES when you add more chains.  I.E.  methyl alcohol is MORE polar than ethyl alcohol, which is more polar than isopropyl alcohol.  Extremely long chain alcohols even with an -OH group are essentially non-polar.
95916
firstly, a water molecule,H2O, is a polar covalent compound.or, the oxygen and the 2 hydrogen atoms have a difference in their electronegativities.\n\nthis results in the oxygen atom pulling the shared electrons towards itself.since electrons are negatively charged, a polarity is developed between the atoms. the oxygen atom has a slight negative charge while the 2 hydrogen atoms have slight positive charges. \n\nsince opposite charges attract, this will obviously result in the oxygen atom of one molecule to be attracted to a hydrogen atom of another molecule and vice versa.\n\nwhen water is in the liquid state, the molecules have a lot of kinetic energy, and because the charges are so slight, the molecules have enough energy to overcome a fixed sorta bond between them.many H atoms are attached to one 0 atom, and this results in more density.\n\nwhen in solid state, or ice, the molecules have lost their kinetic energy and hydrogen bonding comes into the picture. since a water molecule is a V kinda shape, and two ends are H atoms, a lot of space is required to get a complete, closed link of water molecules.so, many clumps of '0' shaped 'links' like this are formed.\n\nsince the water molecules have spread out so much in the solid state[due to hydrogen bonding] ice occupies more spce than liquid water.
322287
There are many definitions, but the most used is this:\nBases tend to either capture protons (H+) or to release proton-capturing species. \nAcids tend to release protons.\n\npH is just a measure of the amount of protons in a solution. Low pH means a high concentration of H+ (acid solution), and high pH the opposite (alkaline solution).
504582
hydrogen is positively charged, so it's the hydrogen regions. The oxygen is negatively charged, so neither the oxygen region of the geometric centre (which is in the middle of the H-O-H triangle shape). the plane of H-O-H is basically one side of the molecule, which is wrong, as both ends will be attracted.