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What is the influence of calcium stearate on the shrinkage of concrete?
Wiki User
∙ 15y ago
Calcium stearate is used to control effloresence in concrete. I don't believe there is any effect on shrinkage. However, it is often added to other concrete admixtures, like water reducers. Those products can effect shrinkage, but usually they help to reduce it.
Wiki User
∙ 15y ago
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reinforced concrete prise
Is calcium a metal or nonmetal?
The element calcium is a metal. It turns out that calcium (Ca) is in Group 2 of the periodic table, and all the elements in Group 1 and Group 2 are "true" metals.
How do you remove the white film on aggregate concrete left from rain running off the side of schist walls?
A mild acid will remove the film. The film may be from the rock walls or from the concrete itself. Most hardware stores in the US have concrete remover either in the cleaning products or floor tile aisles. A household product that works for me is Lysol brand toilet bowl cleaner. Spread it on, leave it a few minutes, and hose it off. CLR (Calcium - Lime - Rust) remover will do equally well. If you are extremely concerned about the possibility of damaging the concrete, a slightly milder acid is vinegar, which is 5% acetic acid. Buy the big economy size in the canning supplies section of the supermarket. Hope this is helpful to you.
Reaction from iron nail and calcium metal?
The iron will not react unless you react it with calcium chloride. This is because Chloride is very electronegative (it has a high affinity for electrons) Both iron and calcium are not very electronegative and would like to give away their electrons. The Chloride ion accepts these electrons to get a full valent shell.
Why white scales get deposited in interior of the boilers and electrical kettles?
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How do you remove sodium chloride from calcium stearate?
Sodium chloride is soluble in water, calcium stearate not.Put the mixture in water, stir and filter; sodium chloride remain in solution, calcium stearate on the filter.
What is the chemical formula for Calcium Stearate?
Calcium stearate is carboxylate of calcium that is found in some lubricants and surfactants. It is a white waxy powder. It is produced by heating stearic acid, a fatty acid, and calcium oxide. It is also formed when sodium stearate is added to hard water (as scum). Sodium stearate + CaSO4 -----> C36H70CaO4 + Na2SO4 OR Sodium stearate + Ca(HCO3)2-------------> C36H70CaO4 + NaHCO3 Anyway, just wanted to refresh your memory a little bit... The formula is, as mentioned earlier : C36H70CaO4 Oh, and sodium stearate's just a fancy word for soap...
The properties and application of calcium dodecyl stearate?
Calcium dodecyl stearate is a flaky or needle-like crystal chemical substance with a melting point of 82-93°C. Flammable and low toxicity. Insoluble in water, soluble in ethanol, ether and chloroform. The main use of calcium dodecyl stearate: widely used in lubricants, stabilizers, plastics and rubber additives. Calcium lauryl stearate is used as a lubricant and release agent for constant temperature and various plastic processing, and is an excellent rubber and plastic additive. Calcium dodecyl stearate is also used in organic synthesis.
What is the ratio of Ca2 and stearate anion?
The ratio of Ca2+ ions to stearate anions depends on the specific compound or salt being referred to. For example, in calcium stearate (Ca(C17H35COO)2), the ratio is 1:2, with one Ca2+ ion for every two stearate anions. However, in other compounds, such as calcium di(stearate) (Ca(C17H35COO)2), the ratio may vary.
Which reaction results in the production of soap?
In hard water we find Calcium and Magnesium ions. These react with the Sodium stearate (soap) to form Calcium and magnesium stearate and Na+ ions Sodium stearate+ Ca2+ +Mg2+ --> Calcium stearate + Magnesium stearate + Na+ ions
How calcium stearate is prepared?
Calcium Stearate is prepared by melting stearic acid and adding the stochiometric equivalent weight of calcium hydroxide (hydrated lime). The liquid is then mixed until the reaction is completed. It is usually then spray dried into a powder.
Equation showing the formation of scum when soaps are dissolved in hard water?
Sodium Stearate + Ca2+ and Mg2+ = Calcium Stearate + Na+ Ions (Soap) (Dissolved in water) (Soluble in water)
Is calcium stearate a soap or a salt?
Soaps are usually salts of long chain fatty acids with Sodium or Potassium ion and are soluble in water but Calcium stearate is very slightly soluble in water so can not be used as soap so it is better to consider it as a salt only.
Is calcium stearate considered a soap or a salt?
Soaps are usually salts of long chain fatty acids with Sodium or Potassium ion and are soluble in water but Calcium stearate is very slightly soluble in water so can not be used as soap so it is better to consider it as a salt only.
What chemicals cause scum?
Water containing dissolved Calcium ions (Ca2+) or Magnesium ions (Mg2+) react with soap to form scum.E.g: Calcium ions in hard water react with the stearate ions in soap solution to form scum.Ca 2+ (aq) + 2 stearate 1- (aq) >reacts to form> Ca(stearate)2 (s)Quite complicated but i hope that helps.
Is calcium sulfate vegan?
In some products it can be. Calcium stearate can be derived from animals and vegetables.
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moisture creates calcium to react with concrete
