Dialogue with indra lasmana
Indra : hay iin. .
Iin : hy too
Indra
: do you have a lot of free time?
Iin :
yes, what is it?
Indra : I want to ask chemistry lessons about
acids and bases, because I do not understand much about them either
Iin :
ok, just please, as I know then I will reply.
Indra :
when acid and base are reacted there will be a neutralizing reaction of the
substance whether it will be formed?
Iin
: of course the reaction result is salt and
water.
Indra
: so
salt and water to be formed, So it is.
Indra : then when the blue and blue litmus are input
into the acid or base solution how does it change?
Iin : the
blue lacmus will turn red when input to the acid solution, but the red litmus remains.
While the red litmus will turn to blue when inserted into the alkaline
solution, but the blue lacquer remains.
Indra : ok now I understand, thankyou iin for his
explanation.
Iin : you’re
welcome indra
Explain how to reduce corrosion ?
BalasHapusHere are some ways you can do to prevent / slow down corrosion:
HapusPaint
Paint can prevent direct contact between iron and moist air so that it can slow corrosion. This method is usually done on doors, fences, iron pipes, and others.
Oil with oil
Oil-lubricating can prevent direct contact with water and moisture. This method is usually done on tools and machines.
Wrapped with plastic
This method is commonly used for example on a dish rack and bicycle basket.
Tin Plating
Tin plating is coating with tin. This method is usually done on tin packaging because tin is an anti-rust metal.
Galvanisai
Galvanizing is coating with zinc. This is done because zinc is also an anti-rust metal. For example on: electric poles or telephone poles, water papa, and fences.
Cromium Plating
Cromium Plating is coating using chromium. Just like zinc, chromium can provide protection against corrosion even if there is a broken chromium layer. This method is usually done on bikes and bumper cars.
Note:
Not all metals can be corroded and even gold does not have corrosion at all. Here are some metals that can not experience rust, among others: Aluminum, zinc, tin, copper, silver, and gold.
BalasHapusWhat causes blue lacmus to turn red when inserted into acid?
The blue litmus paper in an alkaline solution will remain blue, since orchiin is an anion, so it will not react with anions (OH-).
HapusThe red litmus paper is prepared by the same process as the manufacture of blue litmus paper, but added a little sulfuric acid or hydrochloric acid to make the color red.
So the mechanism of reaction orchein on the acidic atmosphere will re-occur. If the red litmus lid is inserted into an acidic solution, the color will remain red because the red lute is indeed an orchein in an acidic atmosphere. Meanwhile, if red litmus paper is added alkaline solution, then the blue orchein will re-formed.
Why the reaction between acid and base produces a neutral salt?
BalasHapusfor the example The Na + ions are from strong bases and Cl- ions are also derived from strong acids, so they are both weak Bronsted-Lowry acids and bases so they do not react in water (not hydrolysed). Therefore the solution is neutral or pH = 7.
HapusNaCl (aq) → Na + (aq) + Cl- (aq)
The Na + ions are from strong bases and Cl- ions are also derived from strong acids, so they are both weak Bronsted-Lowry acids and bases so do not react in water (not hydrolysed). Therefore the solution is neutral or pH = 7.
HapusNaCl (aq) → Na + (aq) + Cl- (aq)
Can you explain about neutralizing reaction?
BalasHapusNeutralization reaction is a reaction in which acids and bases react in aqueous solution to produce salt and water. The liquid sodium chloride produced in the reaction is called salt. A salt is an ionic compound composed of a cation of a base and an anion of an acid. A salt is essentially any Ionic compounds that are neither acidic nor alkaline.
HapusIn strong acid and strong base reactions, when equal amounts of strong acids such as hydrochloric acid are mixed with strong bases such as sodium hydroxide, the result is a neutral solution. The reaction product does not have either acidic or basic characteristics. Here is the equation of the molecular equilibrium reaction:
HCL (aq) + NaOH (aq) → NaCl (aq) + H2O (l)
The chemical reaction occurring in a water solution is more accurately represented by the net ion ion equation. The complete ionic equation for the neutralization of hydrochloric acid with sodium hydroxide is written as follows:
H + + Cl- + Na + + OH- → Na + + Cl- + H2O
Since the acids and bases are both strong, they are fully ionized and so on written as ions, as NaCl is formed as a product. Sodium ions and chloride ions are the spectator ions in the reaction, resulting in the following reactions as clean ionic reactions:
H + + 0H- → H2O
All strong acid neutralization reactions with strong bases are clean ionic reactions of hydrogen ions combined with hydroxide ions to produce water.
In reactions involving weak acids and weak bases, reactions in which at least one of the weak components generally do not produce a neutral solution. The reactions between weak nitric acid and potassium hydroxide are strongly shown below.
HNO2 (aq) → KOH (aq) → KNO2 (aq) + H2O (l) Another way of writing clean ion equations, weak acids must be written as molecules because they are not ionized to a large extent in water. The bases and salts are completely separated.
HNO2 + K + + OH- → K + + NO2- + H2O
The only ion spectator is a potassium ion, so the net ion equation is as follows:
HNO2 + OH- → NO2- + H2O The strong hydroxide ion is essentially as a force for weak nitric acid to become ionized. The hydrogen ions from the acid join the hydroxide ions to form water, leaving the nitrite ion as another product. The resulting solution is not neutral [ PH = 7], but slightly alkaline.
The reaction may also involve weak bases and strong acids, resulting in a slightly acidic solution, the equation of molecular and clean ions for the reaction of hydrochloric acid and amino is shown below:
HCl + NH3 → NH4Cl
H + + NH3 → NH4 + [Cl- is a spectator ion] The reaction between a good acid and a weak base may result in a neutral, acidic or basic solution.