52:
528:
Soils with pH values that are higher than 7.3 are usually defined as being alkaline. These soils can occur naturally, due to the presence of alkali salts. Although many plants do prefer slightly basic soil (including vegetables like
407:
There are various, more specific definitions for the concept of an alkali. Alkalis are usually defined as a subset of the bases. One of two subsets is commonly chosen.
513:) – an atypical alkali since it has low solubility in water (although the dissolved portion is considered a strong base due to complete dissociation of its ions)
250:
for basic, especially for bases soluble in water. This broad use of the term is likely to have come about because alkalis were the first bases known to obey the
733:
573:
772:
251:
430:
Any base that is soluble in water and forms hydroxide ions or the solution of a base in water. (This includes both Mg(OH)
557:), evaporation concentrates the naturally occurring carbonate salts, giving rise to an alkalic and often saline lake.
745:
577:
135:
116:
335:
88:
451:
73:
95:
798:
634:
616:
278:), referring to the original source of alkaline substances. A water-extract of burned plant ashes, called
685:
102:
582:
302:) was produced. Caustic potash was traditionally used in conjunction with animal fats to produce soft
38:
84:
396:
The terms "base" and "alkali" are often used interchangeably, particularly outside the context of
69:
62:
20:
780:
657:
652:
467:
625:
564:
401:
314:, which was first derived from caustic potash, and also gave potassium its chemical symbol
220:
8:
720:
629:
568:
506:
480:
416:
362:
299:
283:
717:
alkali – definition of alkali by the Free Online
Dictionary, Thesaurus and Encyclopedia
741:
492:
287:
769:
109:
662:
474:
384:
343:
243:
212:
205:
159:
700:
776:
355:
704:
537:), most plants prefer a mildly acidic soil (with pHs between 6.0 and 6.8), and
373:
307:
306:, one of the caustic processes that rendered soaps from fats in the process of
209:
792:
647:
538:
534:
463:
411:
A basic salt of an alkali metal or alkaline earth metal (this includes Mg(OH)
366:
16:
Basic, ionic salt of an alkali metal or alkaline earth metal chemical element
620:
607:
597:
216:
31:
716:
588:
523:
275:
756:
611:
380:
310:, one known since antiquity. Plant potash lent the name to the element
27:
489:– generic term for either of two previous salts or their mixture
254:
definition of a base, and they are still among the most common bases.
603:
550:
500:
397:
339:
311:
232:
149:
51:
372:
Alkaline solutions are slippery or soapy to the touch, due to the
530:
424:
342:
ions (OH) when dissolved in water. Common properties of alkaline
247:
387:
are only soluble when reacting with an acidic aqueous solution.
279:
189:
592:
439:
224:
223:. An alkali can also be defined as a base that dissolves in
303:
180:
174:
486:
329:
165:
351:
228:
286:, was mildly basic. After heating this substance with
391:
350:
Moderately concentrated solutions (over 10 M) have a
171:
193:
177:
168:
376:
of the fatty substances on the surface of the skin.
162:
76:. Unsourced material may be challenged and removed.
679:
677:
354:of 10 or greater. This means that they will turn
790:
294:), a far more strongly basic substance known as
688:: a dictionary of universal knowledge, Volume 1
674:
37:"Alkaline" redirects here. For other uses, see
690:. J.B. Lippincott & Co. 1888. p. 148.
483:(KOH) – commonly called "caustic potash"
450:The second subset of bases is also called an "
199:
477:(NaOH) – often called "caustic soda"
262:The word "alkali" is derived from Arabic
136:Learn how and when to remove this message
701:Alkali | Define Alkali at Dictionary.com
499:) – saturated solution known as "
462:Alkali salts are soluble hydroxides of
791:
768:Davis, Jim and Milligan, Mark (2011).
330:Common properties of alkalis and bases
227:. A solution of a soluble base has a
759:. KryssTal. Retrieved on 2012-04-18.
74:adding citations to reliable sources
45:
322:), which ultimately derived from al
200:
13:
392:Difference between alkali and base
14:
810:
783:, Department of Natural Resources
578:San Bernardino County, California
517:
470:, of which common examples are:
158:
50:
544:
457:
61:needs additional citations for
779:Public Information Series 96.
762:
750:
726:
710:
694:
1:
668:
257:
7:
734:"Characteristics of Alkali"
641:
361:Concentrated solutions are
194:
10:
815:
738:Integrated Chemistry Today
723:. Retrieved on 2012-04-18.
707:. Retrieved on 2012-04-18.
560:Examples of alkali lakes:
521:
36:
25:
18:
770:Why is Bear Lake so blue?
39:Alkaline (disambiguation)
705:Dictionary.reference.com
686:Chambers's encyclopaedia
585:on the Utah–Idaho border
26:Not to be confused with
358:from colorless to pink.
282:and composed mostly of
21:Alkali (disambiguation)
781:Utah Geological Survey
757:Acids, Bases and Salts
318:(from the German name
242:, is commonly used in
231:greater than 7.0. The
732:Chung, L.H.M. (1997)
721:Thefreedictionary.com
658:Alkaline magma series
653:Alkaline earth metals
468:alkaline earth metals
383:, although some like
379:Alkalis are normally
541:can cause problems.
402:chemical engineering
221:alkaline earth metal
70:improve this article
19:For other uses, see
799:Inorganic chemistry
630:Lake County, Oregon
569:Lake County, Oregon
507:Magnesium hydroxide
481:Potassium hydroxide
417:magnesium hydroxide
300:potassium hydroxide
284:potassium carbonate
775:2015-07-02 at the
338:, ones which form
272:the calcined ashes
238:, and less often,
736:, pp. 363–365 in
493:Calcium hydroxide
419:) but excludes NH
344:aqueous solutions
288:calcium hydroxide
146:
145:
138:
120:
806:
784:
766:
760:
754:
748:
730:
724:
714:
708:
698:
692:
691:
681:
663:Base (chemistry)
533:and fodder like
475:Sodium hydroxide
385:barium carbonate
334:Alkalis are all
203:
202:
197:
187:
186:
183:
182:
179:
176:
173:
170:
167:
164:
141:
134:
130:
127:
121:
119:
78:
54:
46:
814:
813:
809:
808:
807:
805:
804:
803:
789:
788:
787:
777:Wayback Machine
767:
763:
755:
751:
731:
727:
715:
711:
699:
695:
683:
682:
675:
671:
644:
547:
526:
520:
512:
498:
460:
443:
437:
433:
422:
414:
394:
356:phenolphthalein
336:Arrhenius bases
332:
260:
161:
157:
142:
131:
125:
122:
79:
77:
67:
55:
42:
35:
24:
17:
12:
11:
5:
812:
802:
801:
786:
785:
761:
749:
725:
709:
693:
672:
670:
667:
666:
665:
660:
655:
650:
643:
640:
639:
638:
637:, Saskatchewan
632:
623:
614:
601:
595:
586:
580:
571:
546:
543:
539:alkaline soils
522:Main article:
519:
516:
515:
514:
510:
504:
496:
490:
484:
478:
459:
456:
452:Arrhenius base
448:
447:
441:
438:, which forms
435:
431:
428:
420:
412:
393:
390:
389:
388:
377:
374:saponification
370:
367:chemical burns
359:
331:
328:
308:saponification
296:caustic potash
259:
256:
144:
143:
58:
56:
49:
15:
9:
6:
4:
3:
2:
811:
800:
797:
796:
794:
782:
778:
774:
771:
765:
758:
753:
747:
746:9789623722520
743:
739:
735:
729:
722:
718:
713:
706:
702:
697:
689:
687:
680:
678:
673:
664:
661:
659:
656:
654:
651:
649:
648:Alkali metals
646:
645:
636:
635:Tramping Lake
633:
631:
627:
624:
622:
618:
617:Redberry Lake
615:
613:
609:
605:
602:
599:
596:
594:
590:
587:
584:
581:
579:
575:
572:
570:
566:
563:
562:
561:
558:
556:
553:(also called
552:
542:
540:
536:
535:buffalo grass
532:
525:
518:Alkaline soil
508:
505:
502:
494:
491:
488:
485:
482:
479:
476:
473:
472:
471:
469:
465:
464:alkali metals
455:
453:
445:
429:
426:
418:
410:
409:
408:
405:
403:
399:
386:
382:
381:water-soluble
378:
375:
371:
368:
364:
360:
357:
353:
349:
348:
347:
345:
341:
337:
327:
325:
321:
317:
313:
309:
305:
301:
297:
293:
289:
285:
281:
277:
273:
269:
265:
255:
253:
249:
245:
241:
237:
234:
230:
226:
222:
218:
214:
211:
207:
196:
191:
185:
155:
151:
140:
137:
129:
118:
115:
111:
108:
104:
101:
97:
94:
90:
87: –
86:
82:
81:Find sources:
75:
71:
65:
64:
59:This article
57:
53:
48:
47:
44:
40:
33:
29:
22:
764:
752:
737:
728:
712:
696:
684:
621:Saskatchewan
608:Owens Valley
598:Lake Turkana
574:Baldwin Lake
559:
554:
551:alkali lakes
548:
545:Alkali lakes
527:
461:
458:Alkali salts
449:
406:
395:
333:
323:
319:
315:
295:
291:
271:
267:
263:
261:
239:
235:
217:alkali metal
153:
147:
132:
123:
113:
106:
99:
92:
80:
68:Please help
63:verification
60:
43:
32:alkali metal
626:Summer Lake
589:Lake Magadi
565:Alkali Lake
524:Alkali soil
292:slaked lime
276:calcination
270:), meaning
240:alkalescent
188:; from the
669:References
612:California
555:soda lakes
96:newspapers
28:Alkalinity
604:Mono Lake
583:Bear Lake
501:limewater
398:chemistry
365:(causing
346:include:
340:hydroxide
312:potassium
258:Etymology
252:Arrhenius
233:adjective
150:chemistry
126:June 2008
793:Category
773:Archived
642:See also
600:in Kenya
264:al qalīy
236:alkaline
85:"Alkali"
606:, near
531:cabbage
509:(Mg(OH)
495:(Ca(OH)
425:ammonia
363:caustic
248:synonym
244:English
204:) is a
195:al-qāly
110:scholar
744:
434:and NH
320:Kalium
280:potash
268:alkali
219:or an
215:of an
201:القلوي
190:Arabic
154:alkali
112:
105:
98:
91:
83:
593:Kenya
326:ali.
304:soaps
274:(see
246:as a
225:water
210:ionic
206:basic
192:word
152:, an
117:JSTOR
103:books
742:ISBN
466:and
400:and
266:(or
213:salt
89:news
610:in
591:in
549:In
487:Lye
454:".
427:)).
148:In
72:by
30:or
795::
740:.
719:.
703:.
676:^
628:,
619:,
576:,
567:,
446:.)
444:OH
440:NH
404:.
369:).
352:pH
229:pH
208:,
198:,
181:aɪ
511:2
503:"
497:2
442:4
436:3
432:2
423:(
421:3
415:(
413:2
324:k
316:K
298:(
290:(
184:/
178:l
175:ə
172:k
169:l
166:æ
163:ˈ
160:/
156:(
139:)
133:(
128:)
124:(
114:·
107:·
100:·
93:·
66:.
41:.
34:.
23:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
