what is the empirical definition of a base?
355623
The common definition of a base is a chemical compound that absorbs hydronium ions when dissolved in water (a proton acceptor). An alkali is a special example of a base, where in an aqueous environment, hydroxide ions are donated. Bases and acids are seen as opposites because the effect of an acid is to increase the hydronium ion (H3O+) concentration in water, whereas bases reduce this concentration. Arrhenius bases are water-soluble and these solutions always have a pH greater than 7.
821693
None that I know of currently.  In all but the most isolated, primitive societies, the base 10 is used.  (Of course computers use base 2, but they hardly qualify as a civilization.)\n\nThere is prehistoric evidence that a few tribes used a base 5 system; the Romans had a complex system that was very loosely based on 10, and the ancient Mayan civilization used base 60!
364809
hey do u mean bases in chem.? well if it is in chem, then a base is not an alkali! a base is a compound which reacts with the hydronium ions of an acid to give salt and water only. they are insoluble in water but an alkali is soluble in water. Hence all alkali's are bases but all bases are not alkali's. eg of a base Cuo and of an alkali KoH
797939
At the base of, the principle of, the basis of.  It means that non-linear impacts upon demand are the basis of the concerns over the possible effects of high oil prices.
417834
Something that requires water in order to become a true Base\n\ne.g. CaO + H2O -> Ca(OH)2
529279
Acids.\n\n0-7 = Acid\n7 = Neutral\n7+ = Base
925482
There are two ways to define bases.\n\n1\nThey are inorganic compounds which give negatively charged OH- anions (hydroxyl anions) which can react with cations in a solution. If nothing to react with, they just rise the concentration of hydroxyl anions [OH-] in the water solution. This leads to the rise of pH: if there is 10 times more hydroxyl anions than protons (causing acidity), pH = 8; if 100 times, pH is 9 e.t.c. An example: NaOH.\n\n2\nOrganic compounds can also act like bases: they can take protons (H+) from other compounds. We can say that they decrease the amount of acidic groups in other compounds in this way. Examples of this group of compounds are nitrogen-containing alkaloids (nicotine e.t.c.) which can react like bases with organic acids, forming salts. No effect on pH in the environment, just a reaction between organic base and organic acid.
624341
A solution that contains an equivalent amount of an acid and its conjugate base.
40918
an organic base is an organic compound(contains carbon) that will act as a base in a reaction.ie it will either donate an OH- ion or it will accept a H+ ion..ie a proton
739831
At first a molecule that donates a proton is an acid, not a base - according to the Broensted-Lowry definition of acids and bases.\n\nAdding an electronegative atom in a molecule of an acid increases the acidity - or, the same decreases the basicity - of the molecule. For example:\n\nCl-CH2COOH is a stronger acid than CH3COOH\n\nCl-NH2 is a weaker base than NH3.
357070
The equivalence point is where all the reactants have reacted.  Since you have a strong base and a weak acid, the pH of the base pulls it over to the basic side of the scale rather than neutral.  Simply, there are more OH- ions than H+ ions total.  All the H+ ions are reacted so you are left with extra OH- ions.  Also works vice-versa.
1118024
Acidic \n\nbelow 6 acidic above 7 basic
42935
A) is wrong because acids produce hydrogen ions, wich are positive\nB) is wrong because bases produce hydroxide ions\nC) is just strange\nD) is strangly worded too, but nothing is inherently wrong with that sentence\n\nSo, I'd go with D
1164856
base times the hieght divided by 2\n\nthe base is the bottom or the triangle and the high it the top of the triangle to the middle of the base
375903
I'm going to take a wild guess here and assume that your question belongs in the Chemistry section, not here in Math.  In Math, the notion of "the empirical formula" doesn't have enough information in it to have an answer, but if you meant this as in Chemistry, the below link is a fairly straightforward explanation & tutorial...
1023654
A = bh\nb = base and h = height
1131511
the change of base rule says that\n\nlog(a)x = log(b)x / log(b)a\n\n(the (a) and (b) represent the base of the log).  Since the Common log is base 10, what then (b) in the formula is 10.\n\nlog(a)x = log x / log a\n\nFor example, if you want to evaluate log(2)5, you would do log 5/log 2.