definition
A divalent radical or anion containing two oxygen atoms linked by a covalent bond; any substance containing this group which yields hydrogen peroxide when treated with an acid
definition
Hydrogen peroxide, especially an aqueous solution used as a bleach
definition
Any unstable compound or general formula R-O-O-R'
definition
To treat (something) with hydrogen peroxide, especially hair in order to bleach it
In some cases, such as that of peroxide of lead, an increase of resistance takes place.
The formaldehyde at once undergoes a process of condensation oi- polymerization by the protoplasm of the plastid, while the hydrogen peroxide is said to be decomposed into water and free oxygen by another agency in the cell, of the nature of one of the enzymes of which we shall speak later.
His researches on sebacic acid (1802) and on bile (1807), and his discovery of peroxide of hydrogen (1818) also deserve mention.
The action proceeds in two stages; in the first hydrogen peroxide and potassium aurocyanide are formed, and in the second the hydrogen peroxide oxidizes a further quantity of gold and potassium cyanide to aurocyanide, thus (1) 2Au+4KCN +02+2H20=2KAu(CN)2+4KOH+H202;(2)2Au+4KCN+2H202= 2KAu(CN) 2 +4KOH.
Serullas and Roscoe; Davy and Stadion investigated chlorine peroxide, formed by treating potassium chlorate with sulphuric acid.
He then tried the direct combination of nitric oxide with liquid nitrogen peroxide.
It is also prepared by the action of phosphorus pentachloride on potassium nitrite or on nitrogen peroxide.
It is also obtained by the action of hydrogen peroxide on hydrocyanic acid, or of manganese dioxide and sulphuric acid on potassium cyanide.
A higher hydrated oxide, CeO 3 xH 2 O, is formed by the interaction of cerous sulphate with sodium acetate and hydrogen peroxide (Lecoq de Boisbaudran, Comptes rendus, 1885, loo, p. 605).
The sulphides can be removed by " oxidizing " them into thiosulphates by means of atmospheric air, with or without the assistance of other agents, such as manganese peroxide; or by " carbonating " them with lime-kiln or other gases containing carbon dioxide; or by precipitating them with lead or zinc oxide.
A peroxide, N102, has been obtained in the form of dinickelite of barium, BaO.
A hydrated form, Ni 3 0 4 ..2H 2 O, is obtained when the monoxide is fused with sodium peroxide at a red heat and the fused mass extracted with water.
On the other hand the stability of the known oxygen compounds increases with the atomic weight, thus iodine pentoxide is, at ordinary temperatures, a well-defined crystalline solid, which is only decomposed on heating strongly, whilst chlorine monoxide, chlorine peroxide, and chlorine heptoxide are very unstable, even at ordinary temperatures, decomposing at the slightest shock.
Chlorine peroxide must be collected by displacement, as it is soluble in water and readily attacks mercury.
It is a very powerful oxidant; a mixture of potassium chlorate and sugar in about equal proportions spontaneously inflames when touched with a rod moistened with concentrated sulphuric acid, the chlorine peroxide liberated setting fire to the sugar, which goes on burning.
It may be distinguished from chloric acid by the fact that it does not give chlorine peroxide when treated with concentrated sulphuric acid, and that it is not reduced by sulphurous acid.
They are all decomposed on heating, with evolution of oxygen; and in contact with concentrated sulphuric acid with liberation of chlorine peroxide.
Copper dioxide, CuO 2 H 2 O, is obtained as a yellowish-brown powder, by treating cupric hydrate with hydrogen peroxide.
It is a grey coloured powder which is readily decomposed by dilute acids with the production of hydrogen peroxide.
The residue in the filter is ignited and fused with a little sodium carbonate and nitrate, or with sodium peroxide.
Silver peroxide, AgO, appears under certain conditions as minute octahedra when a solution of silver nitrate is electrolysed, or as an amorphous crust in the electrolysis of dilute sulphuric acid between silver electrodes.
Hydrogen peroxide is also formed.
It is certain that the formation of hydrogen peroxide and ozone accompany the glowing, and in 1848 Schonbein tried to demonstrate that it.
The solution is stable to oxidizing agents such as dilute hydrogen peroxide and chlorine, but is oxidized by potassium permanganate to phosphoric acid; it does not reduce salts of the heavy metals.
The first is formed when 30% hydrogen peroxide reacts with phosphorus pentoxide or metaor pyrophosphoric acids at low temperatures and the mixture diluted with ice-cold water.
Perphosphoric acid is formed when pyrophosphoric acid is treated with a large excess of hydrogen peroxide.
The alkaloid is a strong base and is very readily oxidized; chromic acid converts it into normal butyric acid and ammonia; hydrogen peroxide gives aminopropylvalerylaldehyde, NH 2 CH(C 3 11 7) (CH2)3 CHO, whilst the benzoyl derivative is oxidized by potassium permanganate to benzoyl-a-aminovaleric acid, C 6 H 5 CO NH CH(C 3 H 7) (CH 2)3 COOH.
The formation of addition compounds with the halogens, halogen hydrides, and with nitrosyl chloride, is characteristic of many, whilst others unite readily with nitrogen peroxide.
The failure of this definition is seen in the case of lead dioxide, which is certainly a peroxide in properties, but it is also the typical oxide of Group IV.
Peroxides may be basic or acidic. Some basic oxides yield hydrogen peroxide with acids, others yield oxygen (these also liberate chlorine from hydrochloric acid), and may combine with lower acidic oxides to form salts of the normal basic oxide with the higher acidic oxide.
Na 0 0 Na, Bab, which yield hydrogen peroxide with acids; and (2) the polyoxides, having the oxygen atoms doubly linked to the metallic atom, e.g.
This theory was controverted by Wyndham Dunstan, who attempted to prove that carbon dioxide was not necessary to rusting; and in place of the acid theory, he set up a scheme which involved the production of hydrogen peroxide.
They may also be prepared by oxidizing chromium salts (in alkaline solution) with hydrogen peroxide, chlorine, bleaching powder, potassium permanganate and manganese dioxide.
By the addition of hydrogen peroxide to a solution of chromic acid, a fine blue coloration due to a perchromic acid is produced which is readily absorbed by shaking out with ether.
It is shown that the blue solution most probably contains the acid of composition, H2Cr203, whilst in the presence of an excess of hydrogen peroxide more highly oxidized products probably exist.
The pharmacological action of hydrogen peroxide (H202), potassium permanganate, powdered charcoal and some other oxidizing agents depends on the readiness with which they give up oxygen.
Hydrogen Peroxide, to remove any bloodstains from carpets.
Peroxisomes - derived from rough eroxisomes - derived from rough ER, that contain enzymes that will form hydrogen peroxide - which phagocytic cells use to kill bacteria.
Therefore it is important to try and comprehend how reduced flavin can complex and actually reduce oxygen to hydrogen peroxide.
A good combo is wash using hydrogen peroxide - this will kill off anything on the surface, then sprinkle with antibiotic powder.
The gel contains hydrogen peroxide which bleaches the teeth, together with glycerin and purified water to protect your teeth from dehydration.
When honey is diluted, a special enzyme the bees have added produces hydrogen peroxide, a well-known antibiotic.
Peroxisomes - derived from rough ER, that contain enzymes that will form hydrogen peroxide - which phagocytic cells use to kill bacteria.
To prevent this, you heat the solution for some time to decompose the hydrogen peroxide into water and oxygen before adding the acid.
Selenium Selenium is also important in the process of destroying hydrogen peroxide.
It can often help to rinse the mouth with a diluted solution of 3 per cent hydrogen peroxide.
Excess hydrogen peroxide may then react with transition metals to form hydroxyl radical.
Catalyst (hardener) used for polyester resins is an organic peroxide (methyl ethyl ketone peroxide) and is particularly dangerous.
It was not an overturned lorry, but a lorry carrying nitrogen peroxide that caught fire.
I placed the mouthpiece above in a jar containing Hydrogen Peroxide.
Scrabble® Word Cheat is an incredibly easy-to-use tool that is designed to help users find answers to various word puzzles. With the help of Scrabble Word Cheat, you can easily score in even the most difficult word games like scrabble, words with friends, and other similar word games like Jumble words, Anagrammer, Wordscraper, Wordfeud, and so on. Consider this site a cheat sheet to all the word puzzles you have ever known.
Please note that SCRABBLE® is a registered trademark. All intellectual property rights for the game are owned by Hasbro Inc in the U.S.A and Canada. J.W. Spear & Sons Limited of Maidenhead, Berkshire, England (a subsidiary of Mattel Inc.) reserves the rights throughout the rest of the world. Also, Mattel and Spear are not affiliated with Hasbro. Words with Friends is a trademark of Zynga with Friends.
Scrabblewordcheat.com is not affiliated with SCRABBLE®, Mattel Inc, Hasbro Inc, Zynga with Friends, or Zynga Inc in any way. This site is only for entertainment and is designed to help you crack even the most challenging word puzzle. Whenever you are stuck at a really difficult level of Scrabble or words with friends, you will find this site incredibly helpful. You may also want to check out: the amazing features of our tool that enables you to unscramble upto 15 letters or the advanced filters that lets you sort through words starting or ending with a specific letter.