What does this mean: Solutions of alkalis will precipitate the insoluable hydroxides of other metals from solutions of their salts.
2006-07-10 12:25:05 · 5 answers · asked by surani_ud 3 in Science & Mathematics ➔ Chemistry
An alkali solution is any solution that contains a greater-than-normal concentration of OH- ions in water. Now if a salt is dissolved in water, it dissociates into its constituent cations (positively charged ions) and anions (negatively charged ions). In particular, if a salt is formed between a metal and any other anion, the metal will become a cation in solution. If the solution is alkaline, the OH- ions will react with the metal cations to form hydroxides (XOH, where X is some metal, e.g. NaOH). If these hydroxides happen to be insoluble, they will rapidly leave the solution following this reaction - or in other words, they will precipitate.
2006-07-10 12:32:29 · answer #1 · answered by Pascal 7 · 0⤊ 0⤋
My first thought is read your chemistry book. My second is only a guess, so read the material, just in case. Hydroxides of "other" metals can be precipitated by adding solutions of alkalis to the solutions of their (metals?) salts. Like I said, just re organizing the words and that's not really going to help on a test or homework. Try a search engine on the web to look up key words, like chemistry, solutions, salts, alkali and what precipitate means in a chemistry context. Leach out of, or seperate from may be what "precipitate" means, but as I said, do the research.
I don't do homework since my kids grew up.
If this isn't for a class, do the same.
2006-07-10 12:41:54 · answer #2 · answered by Anonymous · 0⤊ 0⤋
insoluble hydroxides:calcium and magnesium OH are sparingly soluble and other metal OH are insoluble except Na and K OH.the solutions of their salts (metal) for eg CuCl2 reacts with alkali NaOH then Cu(OH)2 formed is insoluble!
I think i am right
2006-07-10 12:35:46 · answer #3 · answered by bhaskar 1 · 0⤊ 0⤋
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2016-12-14 06:28:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
well metal hydroxide salts are insoluble for a lot of things. just memorize the solubility rules. if it's heavy it won't dissolve and will ppt out.
2006-07-18 08:01:48 · answer #5 · answered by shiara_blade 6 · 0⤊ 0⤋