Pure water has a pH of:?
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7.  Given that it is pure.
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A. H2O. Molecular water is 2H2O
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Ph is A measure of the acidity or alkalinity of a solution, numerically equal to 7 for neutral solutions, increasing with increasing alkalinity and decreasing with increasing acidity. The pH scale commonly in use ranges from 0 to 14.
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2 M HCl\n\nHCl is a strong acid and acids have pH less than 7\n\nH3PO4 is a weak acid\n\nNH3 is a base\n\nNaOH is a base
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Vinegar's pH is between 2-3.
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pH from 0 to 7: Acid solution.\nPH from 7 to 14: Basic solution.
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[H3O+]=1 x 10^-4 => pH=-log[H+]=4 --- acidic\n[OH-]=1X10^-6 => pOH=-log[OH-]=6 => pH=14-6=8 --- basic\n\nHCl --> H+ + Cl-\n[H+]= 5.6 x 10^-4\npH = -log[H+] = -log[5.6 x 10^-4] = 3.25 --- acidic\npOH = 14 - 3.25 = 10.75\n-log[OH-] = 10.75 => [OH-]=1.78 x 10^-11\n\nSince HBr --> H+ + Br-\npH of 1 x 10^-4 of HBr = -log[1x10^-4] = 4 --- acidic\n\nSince Ca(OH)2 --> Ca2+ + 2OH-\npOH = -log[OH-] = -log(2 * 5 x 10^-4) = 3\npH = 14-3 = 11 --- basic
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H3PO3\n\nnot H3PO4, which is PhosphoRIC acid
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Weak acids and organic acids in water.\n\nBut remember the solution depends on what the solvent is.  In water, the seven strong acids essentially completely ionize...i.e. can be considered completely ionized.
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An acid is a substance which is capable of forming hydrogen ions when dissolved in water.
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NH3 because the rate of ionization in pure water is less than that of the others.
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2.2 to 3.6 pH. in this range it's red.
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0.001 = 10^-3  => 14-3=11=PH
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PH of the aqueous solution of NaCl is 6 - 7 @ 1% by weight
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H2O...two parts hydrogen and 1 part oxygen in each of the water molecules.
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Pure water is 7, but it depends on the source of the drinking water. It can vary by a few points in either direction.
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Alkalinity gets into water as the presence of the OH- ions increase. Remember that Water has a pH of 7... so its equality semi-acidic (as it can have the H ions donating electrons), or semi-basic (as it can accept the electrons). As the OH- ions increases, the mixture has a greater tendency of wanting electrons to keep it stable. The greater affinity / presence of OH- ions, the more basic or alkaline the water becomes.\n(Hope that was of help).