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Photographic fixing agent. An emulsion of sodium thiosulfate (called hypo by photographers) is used to stop development of exposed film. Thiosulfate converts undeveloped silver bromide grains in the film into water-soluble silver thiosulfate complexes that can be removed when the film is washed.
S2O32- + AgBr(s) AgS2O3- + Br-
S2O32- + AgS2O3- Ag(S2O3)23-
- Thiosulfate is also an antidote for cyanide poisoning. It reacts with cyanide to produce sulfite and thiocyanate ions:
CN- + S2O32- SCN- + SO32-This reaction is catalyzed by an enzyme produced by cell mitochondria to neutralize small quantities of ingested cyanide (which occurs naturally in cassava root, lima beans, and almonds!).
What else can I help you with?
Is sodium thiosulphate an acid or a base?
Sodium thiosulfate is neither an acid nor a base; it is a salt composed of sodium cations and thiosulfate anions. It is often used in photography as a fixing agent to dissolve unexposed silver halide in film or prints.
What is the difference between sodium sulphate and sodium thiosulphate?
Sodium sulfate (Na2SO4) is a white crystalline compound used in detergents, paper, and glass manufacturing. Sodium thiosulfate (Na2S2O3) is a colorless crystalline compound used in photography as a fixing agent and in medical treatments for cyanide poisoning. The key difference lies in their chemical structures and applications.
Is sodium thiosulphate a reactant?
Yes, sodium thiosulfate can be a reactant in chemical reactions, such as in photography as a fixing agent or in medical treatments for cyanide poisoning. It can also be used in measuring the concentration of other substances through titration reactions.
What color is Sodium Thiosulphate?
Sodium thiosulphate is typically white in color, appearing as a crystalline powder or solid.
Why is sodium thiosulphate used in iodometric titration?
· In analytical chemistry, sodium thiosulphate is used for the determination of the strength of a given solution of iodine. · Sodium thiosulphate is preferred in iodometric analysis due to the fact that sodium thiosulphate is oxidized by iodine. It is also used to determine the strength of many oxidizing agents.
Is sodium thiosulphate an acid or a base?
Sodium thiosulfate is neither an acid nor a base; it is a salt composed of sodium cations and thiosulfate anions. It is often used in photography as a fixing agent to dissolve unexposed silver halide in film or prints.
Indicator used during the standardization of sodium thiosulphate?
Starch
What is the difference between sodium sulphate and sodium thiosulphate?
Sodium sulfate (Na2SO4) is a white crystalline compound used in detergents, paper, and glass manufacturing. Sodium thiosulfate (Na2S2O3) is a colorless crystalline compound used in photography as a fixing agent and in medical treatments for cyanide poisoning. The key difference lies in their chemical structures and applications.
Is sodium thiosulphate a reactant?
Yes, sodium thiosulfate can be a reactant in chemical reactions, such as in photography as a fixing agent or in medical treatments for cyanide poisoning. It can also be used in measuring the concentration of other substances through titration reactions.
Why is hypo used in photography?
Hypo, or sodium thiosulfate, is used in photography to fix or stabilize the image on photographic paper by removing any unexposed silver halide. This process helps to make the image permanent and prevent further exposure to light from affecting the final print.
What color is Sodium Thiosulphate?
Sodium thiosulphate is typically white in color, appearing as a crystalline powder or solid.
What is the use of Sodium thiosulphate in iodometry?
In iodometry sodium thiosulphate is used because it is standardized by potassium dichromate and it is the best and relaible way to standardized sodium thiosulphate using iodometric titration. Infact sodium thiosulphate is also standardized by iodimetry. The difference between both of them is only of iodine. In iodometry iodine gas is liberated that will further react with sodium thiosulphate but in iodimetry standard solution of iodine is used.
Why is sodium thiosulphate used in iodometric titration?
· In analytical chemistry, sodium thiosulphate is used for the determination of the strength of a given solution of iodine. · Sodium thiosulphate is preferred in iodometric analysis due to the fact that sodium thiosulphate is oxidized by iodine. It is also used to determine the strength of many oxidizing agents.
Which of the following is used as food preservative 1 sodium Benzoate 2 sodium Thiosulphate 3 sodium Hydroxide 4 sodium Bicarbonate?
1.sodium benzoate
What is sodium thiosulphate capable of?
Sodium thiosulfate is used against cyanide poisoning and pitiryazis.For nonmedical uses see this link.
Why use sodium Bicarbonate for titration of sodium thiosulphate using pottasium dicromate?
because sodium thiosulphate is unstable and iodine also so to maintain neutral medium we have to use sodiumcarboate
What is a bromin?
Sodium thiosulphate solution (5-25 %)
