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What color does Phenolphthalein possess in the presence of excess hydroxide ions?
Vkw4ua
When excess of hydrogen or hydronium ions are present in the solution , the solution will have pH less than 0. Phenolphthalein possesses dark orange color to the solution having pH less than 0. Hence, phenolphthalein will possess dark orange color in the presence of excess of hydrogen or hydronium ions.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoIn acidic conditions (ie. excess H+ ions) it is colourless. It turns to a bright pink in basic conditions. (alkali, OH-)
Wiki User
∙ 14y agoit's colorless
Wiki User
∙ 6y agoThe color is pink.
Wiki User
∙ 12y agopink
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Copper reacts with sodium hydroxide?
Copper metal itself does not react with sodium hydroxide. But when NaOH is added to a solution of copper ions, it would form a light blue precipitate, which is copper(II) hydroxide, and will NOT dissolve with the excess alkali.
Why does aluminium hydroxide redissolve in excess sodium hydroxide?
Al(OH)3 (s) + OH- (aq) -------> [Al(OH)4]- (aq) Aluminium hydroxide undergoes further reaction with hydroxide ion to from a complex ion, which is of course, soluble in water. Some other metal hydroxides also have similar reaction, like zinc hydroxide, and lead (II) hydroxide.
Is an acid base or salt used to excess hydroxide ions?
Maybe if you asked the question properly, we could answer.
Why zinc hydroxide is soluble in excess of sodium hydroxide solution?
Zinc hydroxide Zn(OH)2 is an inorganic chemical compound. It also occurs naturally as 3 rare minerals: wülfingite (orthorhombic), ashoverite and sweetite (both tetragonal).Like the hydroxides of other metals, such as lead, aluminium, beryllium, tin and chromium, zinc hydroxide (and zinc oxide), is amphoteric. Thus it will dissolve readily in a dilute solution of a strong acid, such as HCl, and also in a solution of an alkali such as sodium hydroxide.It can be prepared by adding sodium hydroxide solution, but not in excess, to a solution of any zinc salt. A white precipitate will be seen: Zn2+ + 2OH- → Zn(OH)2.If excess sodium hydroxide is added, the precipitate of zinc hydroxide will dissolve, forming a colorless solution of zincate ion: Zn(OH)2 + 2OH- → Zn(OH)42-. This property can be used as a test for zinc ions in solution, but it is not exclusive, since aluminum and lead compounds behave in a very similar manner. Unlike the hydroxides of aluminum and lead, zinc hydroxide also dissolves in aqueous ammonia to form a colourless, water-soluble ammine complexThe reason that the zinc hydroxide will dissolve is because the ion is normally surrounded by water ligands; when excess sodium hydroxide is added to the solution the hydroxide ions will reduce the complex to a -2 charge and make it soluble. When excess ammonia is added, it sets up an equilibirum which provides hydroxide ions; the formation of hydroxide ions causes a similar reaction as sodium hydroxide and creates a +2 charged complex with a co-ordination number of 4 with the ammonia ligands - this makes the complex soluble so that it dissolves
What is formed when Excess of sodium hydroxide react with zinc?
This reaction is to be carried out with Sodium hydroxide dissolved in water and Zinc oxide. The product is Sodium Tetrahydroxidozincate(2-) or Simply Sodium Zincate.ZnO + 2 NaOH + H2O ----> Na2Zn(OH)4
Why does zinc hydroxide dissolve in excess dilute sodium hydroxide?
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What is the predicted effect on the reaction of zinc nitrate and excess sodium hydroxide?
The reaction of zinc nitrate and excess sodium hydroxide begins with precipitation of zinc hydroxide ( Zn(OH)2 ), followed by dissolvement after adding excess sodium hydroxide ( 2 OH- ) to formation of zinc aat-ions ( [Zn(OH)4]2- )
What is the balanced equation for zinc hydroxide react with excess sodium hydroxide?
There is no reaction , because of the Common Ion Effect. The Common Ion is the Hydroxide.
When Ammonium Hydroxide excess is added to ferrous sulphate?
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What would the presence of urea indicates?
presence of urea in? excess presence always leads to a defect.
Name a salt which gives white precipitate on ammonium hydroxide solution and is insoluble in excess?
One such salt would be aluminum chloride since it is soluble but when reacted with ammonium hydroxide, the insoluble aluminum hydroxide forms a precipitate. Not sure what is meant by "is insoluble in excess", however.
What do you get when you mix iron3 nitrate with sodium hydroxide?
precipitated Fe(OH)3 = ferric hydroxide or Fe(OH)4-(aq) = ferrate anion in solution, when in excess of hydroxide
What is the brand name of kremil-s?
aluminum hydroxide magnesium hydroxide simethicon
What would happen when Excess of calcium hydroxide in acidic soil?
PH increase
Why do the solution of the white precipitate of Zinc hydroxide dissolve in excess of Ammonium hydroxide?
Ammonium hydroxide dissolves anything that is less strong than itself. The white precipitate of zinc hydroxide is not the whole component. Therefore, it is not as strong.
How to tranform cupric sulfate to cupric hydroxide?
Put drops of Sodium, Potassium, or Ammonium Hydroxide in it. The Cupric hydroxide will precipitate out in blue colour. Dont put excess hydroxide or there will be a formation of another intense blue complex compound
What is redissolved in excess?
Aluminium hydroxide = Al(OH)3 , and Zinc hydroxide = Zn(OH)2 , is redissolved in excess Sodium hydroxide = NaOH (in water solution) : Al(OH)3 + NaOH + H2O ----> NaAl(OH)4 Zn(OH)2 + NaOH + H2O ----> Na2Zn(OH)4
