what is the difference between alkali and bases?
602608
Confusion between base and alkali\nThe terms "base" and "alkali" are often used interchangeably, since most common bases are alkalis. It is common to speak of "measuring the alkalinity of soil" when what is actually meant is the measurement of the pH (base property). Similarly, bases which are not alkalis, such as ammonia, are sometimes erroneously referred to as alkaline.\n\nNote that not all or even most salts formed by alkali metals are alkaline; this designation applies only to those salts which are basic.\n\nWhile most electropositive metal oxides are basic, only the soluble alkali metal and alkali earth metal oxides can be correctly called alkalis.\n\nThis definition of an alkali as a basic salt of an alkali metal or alkali earth metal does appear to be the most common, based on dictionary definitions
713316
HNO3\n\nIf you couldn't answer this question, you must be a real noob in chemistry!!  Well, for other times, here's the way to differentiate betwee acids and bases.\n\nAcids:   acids can be easily identified by the hydrogens they contain.  Most acids have their hydrogen in the beginning of their formula.  HNO3 can be easily identified as an acid: it is commonly called nitric acid.\n\nBases:  most bases can be identified by the (OH) group at the end of their formula... therefore, we can immediately label b) and d) as bases.   \n\nNow here, NH3 is kind of tough to define with the definitions given above.   I believe that the proper explanation is out of your scope for know (from what I can deduce).   So, you'll learn that later on.  But for your info, NH3 is ammonia, the stuff they use in cleaning fluids, and it is basic.\n\nHope this helps.
548546
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",)
933987
The answer will depend on th strength of the solution. At an equal concentration,  sodium hydroxide will have a much higher pH than an solution of sodium carbonate.\n\nA 10% solution of sodium carbonate will have a much higher pH than 0.00001 M solution of sodium hydroxide.
90528
A Bronsted-Lowry acid is a species that donates an H+. So, a Bronsted-Lowry base is a species that accepts an H+.\n\nA Lewis acid is a species that accepts a pair of electrons, and a Lewis base is a species that donates a pair of electrons.
1118981
Supposedly PH balance. Most likely scents that are added, but to be honest I've used both and really haven't had a lot of differences noticed.
184683
pH is the measure of acidity or basicity(alkalinity) of a solution. When pH increases, the solution is more alkaline and when pH decreases the solution is more acidic. A pH of 7 implies that the solution is neither basic(alkaline) nor acidic but neutral. Check the answer to one of the similar questions on Yahoo answers at the following page.
895387
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.
234325
what the previous writer has posted is true only for sodium. equivalence takes into account both the molecular or atomic weight of the species you're interested in and its valence - for example sodium has atomic weight of 23 and a valence of 1 (the ion is +1), hence the 23/1 conversion in the previous answer. This wouldn't be the same for, say, carbonate with mw ~60 and valence of 2 (= equivalence of 30)
617910
You missed to write 'metals'. This is customary.!!!\n\nAll answers are relevant.\n\nmurthy seems to be more relevant to the question.\n\nReview in the following way:\n\nOne thing common with 1A & 2A group is there nature to form alkalies with water; so they are alkaline in nature.\n\nThe second thing common is that they all are metals so they are alkaline metals.\n\nAn additional aspect only to 2A group is that the members of the group are normally more abundent in mineral form (in the earth crust) so to distingwish with the other alkaline metals they are referred as alkaline earth metals.
809057
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.
109387
Maybe you are referring to aqueous solutions of these species? If so, then a solution of glucose will be pH 7 since it does not have any proton or hydroxide to change the neutral pH of water. As for solutions of the rubidium, potassium and cesium IONS, they can accept hydroxide from water if they are stable enough to form the metal hydroxide or if they convert to metal oxides. That means hydrogen ions are also formed and this makes the solution acidic, and hence the pH drops. But large cations like Rb and Cs do not readily take in hydroxide owing to the low polarizability of the cations (see me winking here ;p  ), unlike the small K ion. So, with these clues, can you now find out by yourself the answer to your question? Don't we just love chemistry!
152537
Citric acid is a weak acid, while sodium hydroxide is a strong base. The sodium would fall off the hydroxide (because it's strong), so the reaction would be:\n\nHC6H7O7 + OH- --> H2O + C6H7O7
618488
Look at their conjugate bases and whichever is more stable will have the weakest acid. PKA values are also easy to prove this becuase it is a realtion of the H+ content.
1092099
to determine whether an acid or a base is soluble in say the universal polar solvent water, u should be knowing whether the substance is strong or weak\nnow bases like NaOH, CsOH, RbOH, Mg(OH)2 are strong bases and in solution they give us the cations and anions(mostly the hydroxyl grp)\nbases like Be(OH)2, Fe(OH)2 or 3, Cu(OH)2 or any of their oxides are weak and hence in solution they do not undergo complete dissociation and most of these are insoluble\nso in case ur not in a lab, the only way is to identify their degree of weakness
448790
Alkalinity is usually measured by the presence of bicarbonate (HCO3-) and carbonates (CO3=) and acts to buffer water from acidic inputs, thus is a measure of the buffering capacity of water. Water with high alkalinity have high pH values while water with low alkalinity have low pH values. The hardness of the water is usually determined by the amount of calcium and magnesium salts present in water and is associated with the presence of carbonates. Hard water is generally more productive than soft water waters and can accept more input of salts, nutrients, and acids to their system without change than can soft water waters. So basically, it’s because of the presence of the magnesium. \n\nHope this helps and hope I didn’t confuse you.
315987
No, they are very alkaline.