0
Why does aluminium react slowly with dilute hydrochloric acid in the beginning?
Wiki User
∙ 10y ago
Aluminum reacts slower then similar metals such as Magnesium or Zinc because of an Aluminum Oxide (Al2O3) layer. The dilute acid has to break down the Al2O3 where as in some other reactions this process is not necessary.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What does dilute hydrochloric acid do to limestone?
when acid is on limestone to start with there would be a continues fizz. After time acid would were slowly chip and were away the rock.
What is the process which takes place when ammonium chloride is heated slowly?
Thermal dissociation, with the formation of ammonia and hydrochloric acid.
How do you safely mix hydrochloric acid and nitric acid?
In a fume hood, using gloves, add acids slowly.
What is cold Hydrochloric acid?
I'm not quite sure if you've formulated your question correctly. Hydrochloric acid, HCl(aq), is what it is, whether cold or hot. When you dilute concentrated HCl the dilution reaction releases a lot of heat (more of it the more conc. the HCl is to begin with). Depending on how much you are diluting may cause the reaction vessel to feel warm (or even hot) to the touch. When you dilute concentrated HCl you should determine how much water it will take and then add the HCl slowly to most of the water required. The water has a high specific heat and can absorb the heat being generated (but you still add the acid slowly). You don't add the water to the conc. HCl. The heat generated can be enough to pretty much instantaneously boil the water and it can splatter in your face (carrying some of the acid with it) causing a severe burn.
Does copper or aluminum rust faster?
Neither rust. Only iron rusts. However, copper and aluminium both oxidise. Aluminium oxidises extremely quickly. It you cut a piece of aluminium in the air, it immediately oxidises. The surface that you see/feel for aluminium is actually aluminium oxide. (Al2O3). The surface of aluminium pots and pans in the kitchen is actually aluminium oxide. . Aluminium oxide is impervious to further oxidation and so the aluminium underneath remains as aluminium . Copper on the other hand is a much slower oxidiser. The brown/red colour of copper metal will slowly tarnish (oxidise) over a period of days and weeks, to become a dull colour and if left for a longer time , may go black as copper oxide, or green as copper carbonate.
What does dilute hydrochloric acid do to limestone?
when acid is on limestone to start with there would be a continues fizz. After time acid would were slowly chip and were away the rock.
What is the process which takes place when ammonium chloride is heated slowly?
Thermal dissociation, with the formation of ammonia and hydrochloric acid.
How do you safely mix hydrochloric acid and nitric acid?
In a fume hood, using gloves, add acids slowly.
How do you prepare aqua regia?
1. Pour 150ml concentrated HCl (hydrochloric acid) in a polypropylene container. 2. Carefully and slowly add 50ml of concentrated HNO3 (nitric acid) to the HCl. 3. Aqua regia is prepared. To dilute it, you can add few milliliters of it to water. 4. This soultion can be used to dissolve most metals or to clean glass.
How is the best way to dilute moonshine?
Moonshine is diluted in a proofing barel. Water is added slowly until the desired proof is achieved.
What soluable of thorium?
Thorium is not soluble in water but can react slowly with water; thorium can be dissolved in hydrochloric acid or concentrated nitric acid.
What is cold Hydrochloric acid?
I'm not quite sure if you've formulated your question correctly. Hydrochloric acid, HCl(aq), is what it is, whether cold or hot. When you dilute concentrated HCl the dilution reaction releases a lot of heat (more of it the more conc. the HCl is to begin with). Depending on how much you are diluting may cause the reaction vessel to feel warm (or even hot) to the touch. When you dilute concentrated HCl you should determine how much water it will take and then add the HCl slowly to most of the water required. The water has a high specific heat and can absorb the heat being generated (but you still add the acid slowly). You don't add the water to the conc. HCl. The heat generated can be enough to pretty much instantaneously boil the water and it can splatter in your face (carrying some of the acid with it) causing a severe burn.
Why are airplanes made from aluminium alloys?
Because aluminum alloys are very light without sacrificing much strength and oxidize very slowly.
Does copper or aluminum rust faster?
Neither rust. Only iron rusts. However, copper and aluminium both oxidise. Aluminium oxidises extremely quickly. It you cut a piece of aluminium in the air, it immediately oxidises. The surface that you see/feel for aluminium is actually aluminium oxide. (Al2O3). The surface of aluminium pots and pans in the kitchen is actually aluminium oxide. . Aluminium oxide is impervious to further oxidation and so the aluminium underneath remains as aluminium . Copper on the other hand is a much slower oxidiser. The brown/red colour of copper metal will slowly tarnish (oxidise) over a period of days and weeks, to become a dull colour and if left for a longer time , may go black as copper oxide, or green as copper carbonate.
How do you concentrate dilute salt solutions for the purpose of crystallisation?
Slowly evaporate the the solvent by heating. This will increase the concentration of the solute (the salt) which will eventually begin to crystallize out of the solution.
How is a mineral acid test used to identify minerals?
Dilute acid or vinegar is placed on the specimen to see if it effervesces or reacts. If it instantly reacts it is probably a carbonate mineral like calcite. Other minerals may slowly dissove in the acid. Some minerals have no reaction to the acid.
Why does a population grow slowly in the beginning?
A population grows slowly in the beginning because of child mortality rates. Not all children are guaranteed a safe birth. In the beginning there may be more deaths with less people in the world. As the population grows and grows the mortality rates seem smaller because the population is larger.
