what is the difference between acid alkaline and exothermic perms?
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Glyceryl monothioglycolate – the chemical used in an acid perm – breaks fewer disulphide bonds. Acid perms contain activators that need heat to open the cuticle layers of the hair shaft. Acid perm lotion is gentler and has a pH value of approximately 6 to 7. ... Exothermic perm lotions are self-heating.
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Alkaline batteries, also known as manganese dioxide, are superior to heavy-duty batteries, or zinc chloride, because alkaline have a higher energy capacity, better low-temperature performance and a longer storage life. Alkaline batteries have a higher energy capacity than heavy-duty batteries.
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Water pH measures the amount of hydrogen (acid ions) in the water, whereas water alkalinity is a measure of the carbonate and bicarbonate levels in water. ... Regardless of the starting pH, the higher the alkalinity of the water source, the more acid is required to reduce pH to 5.0.
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Exo/Endothermic represents the relative change in heat/enthalpy in a system, whereas Exer/Endergonic refers to the relative change in the free energy of a system.
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Pickling uses acids that take off the surface of the metal to treat impurities as a sublevel basis. Pickling leaves a greater change to the metal. ... Passivation does not typically go below the surface of the metal and does not change the properties of the metal. The oxide layer left by passivation is only .
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An acid is a substance which donates hydrogen ions into solution, while a base or alkali is one which takes up hydrogen ions.
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An exothermic reaction releases heat to the surroundings and an endothermic reaction absorbs heat from the surroundings.
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Carbon-zinc batteries and alkaline batteries are both dry batteries. Their essential difference is their internal materials. ... The capacity of an alkaline battery is 4-5 times of a carbon battery, and its price is 1.5 -2 times expensive than a carbon-zinc one.
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Alkaline Waves (Cold Waves) have a pH between 9.0 and 9.6. ... True Acid Waves have a pH between 4.5 and 7.0 and require heat to process; they process more slowly than alkaline waves, and do not usually produce as firm a curl as alkaline waves.
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There are several reasons people give for choosing alkaline hydrolysis, when available, instead of traditional flame-based cremation. The process is more environmentally friendly. It uses significantly less fuel and has an overall lower carbon footprint than both traditional cremation and burial.
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AHAs (alpha hydroxy acids, i.e. glycolic and lactic acids) and BHA (beta hydroxy/salicylic acid) both work to 'unglue' the bonds holding dull, dead skin on the surface. ... To work effectively, AHA and BHA exfoliants must be formulated within a narrow pH range, between 3 and 4.
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Oven Cleaner: pH 11 to 13 Most oven cleaners are just as alkaline as ammonia giving them great power to cut through tough grease and grime. Of course, at the top of the alkaline scale, extreme care needs to be taken when using oven cleaner.
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Acids have a pH less than 7. Alkalis have a pH greater than 7 Neutral substances have a pH equal to 7. ... Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-.
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What's the difference between a regular perm and a New Wave perm? A regular, standard perm—which is what I got—uses tiny perm rods to give your hair a tighter, more uniform curl. The New Wave perm, however, uses squishy foam rollers that don't create a uniform wave pattern, like perm rods do.
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The major difference between lactate and lactic acid is one proton in the molecule. All acids have a positive charge (+), indicating that it is a hydrogen ion donor (H+). The conjugate base is lactate, which has a negative charge (-). So, lactic acid is not something your body produces or removes from your muscles.
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The difference between thermal decomposition and thermal dissociation is that thermal decomposition is the breakdown of large substances into smaller substances using heat whereas thermal dissociation is the ionization of a substance using heat.
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The heat (or enthalpy) of neutralization (ΔH) is the heat evolved when an acid and a base react to form a salt plus water. Q in the above equation is -ΔH and is expressed in kJ/mol of water. Neutralization reactions are generally exothermic and thus ΔH is negative.