Can you give a chemical equation 5 with phenomena and principles?

Don't know this? What is the phenomenon of burning wood? The principle is that c+02=c02 state ignition.

NH4HCO3=CO2 +H2O+NH3 (condition is heated).

Phenomenon: A large number of bubbles are generated when the solution is heated, and the bubbles produced can make the clarified lime water (Ca2(OH)2) turbid.

Oxygen produced in the laboratory: potassium chlorate is heated and decomposed into potassium chloride and oxygen 2kclo = (mno2) = 2kcl + 3o under the catalysis of manganese dioxide.

The chemical equation for the preparation of carbon dioxide is: CaCo +2HCl=CaCl +HO+Co.

Caustic soda and dilute salt air-sensitive acid: branch head NaOH + HCl = NaCl + H O

The chemical equation Huaisen formula represents the following reaction principle:

Manganese dioxide catalyst lead hole condition trembling under acre conditions.

2H2O2 = 2H2O Ten O2

CaCO3 deca 2HCI = cacl2 deca h2o deca CO2 naoh deca HCI = naci deca h2o

1. 2h2o2=o2+2h2o

2. caco3+2hcl=cacl2+co2+h2o3. naoh+hcl=nacl+h2o

The above is the chemical equation for the reaction that requires the argument in the bearer's empty question.

The first can be prepared by decomposing hydrogen peroxide, the second is by reacting limestone with hydrochloric acid, and the third is a neutralizing heat reaction to produce salt and water.

1. Calcium hydroxide reacts with carbon dioxide to generate calcium carbonate that is insoluble in water.

Ca(OH)2+CO2=CaCO3 +H2O2, hydrogen peroxide is decomposed to produce water and oxygen under the condition of manganese dioxide as a catalyst.

2h2o2=mno2=2h2o+o2↑

3. The pressure decreases, the solubility of carbon dioxide dissolved in water decreases, and the gas escapes This is a special process, which cannot be expressed by chemical equations, and the carbonic acid in water is decomposed at the same time.

h2co3=h2o+co2↑

There are many complex chemical equations. There are countless organic reactions. Organic reactions in high school chemistry are all simplified.

The chemical reaction rate equation is an equation that calculates the reaction rate of a chemical reaction using the concentration or partial pressure of the reactants.

The rate of a chemical reaction usually refers to a decrease in the concentration of reactants or an increase in the concentration of products per unit of time. Depending on the length of time, the unit time can be expressed in different units such as s, min, hr, day, year, etc., which depends on the speed of the reaction.

The chemical reaction rate equation directly calculates the instantaneous rate at a specific concentration, and the average rate is derived from the integration of both sides of the equation.

Matches that are about to extinguish embers in the air will rekindle when placed in pure oxygen.

It shows that the system with a large concentration has more activated molecular groups than the system with a small concentration, the number of effective collisions increases, the reaction is accelerated, and as a result, the ember matches are rekindled.

In primitive reactions, or in the primitive steps of non-primitive reactions, there is a strict quantitative relationship between the reaction rate and the concentration of reactants, i.e., the law of mass action is followed.

At constant temperature, the rate of the radical reaction is proportional to the continuous product of the power of the reactant concentration, and the power exponent is equal to the stoichiometric number in the reaction equation, which is the law of mass action, and the above equation is also called the expression of the law of velocity.

Definition of the reaction rate equation.

The expression of the law of mass action is often referred to as the reaction rate equation [2], where [a] denotes the concentration of reactants at a certain moment and vi is the instantaneous rate of reaction expressed by the concentration of species i, i.e., the instantaneous rate when the reactant is [a].

ki is a rate constant that does not vary with concentration during the reaction, but ki is a function of temperature, and at different temperatures, ki is different.

The sum of a and b, which is called the reaction order of this primitive reaction, can be said to be a (a+b) order reaction. It can also be said that the reaction is grade A for A and B for B.

In a primitive reaction, a molecule and a molecule b are collided to complete the reaction, and we say that the number of molecules in this reaction is (a+b), or this reaction is a trillion deficit (a+b) molecular reaction.

Only the number of reactive molecules can be said to be the number of reactive molecules, in the primitive reaction, the number of reactive molecules and the number of reactive molecules are equal, but the number of reactive molecules is a microscopic quantity, and the reactive order is a macroscopic quantity.

The indication of whether the two substances can have a chemical reaction is to see whether their products contain the following substances: water, gas, precipitation, weak acid, weak alkali, and whether the reactants are oxidants and reducing agents.

As for sodium sulfate and sulfur dioxide, because sulfur dioxide is oxidizing, but it cannot oxidize sodium sulfate (because the S element in sodium sulfate is already in the most ** state), so there will be no chemical reaction between the two.

This is like playing solitaire, to see if there are reactants in the next chemical formula in the product of one chemical formula, if so, only in the same reaction experiment, then it can basically be judged that the previous chemical formula is the previous reaction process of the next chemical formula. In this way, one after another, one after another, the reaction sequence can basically be sorted out.

If you are not sure whether the reaction occurs, it depends on whether the reaction conditions specified in the chemical formula are met, such as whether the temperature is sufficient, whether the catalyst exists, whether the reactants are complete, and if it is an electrolytic reaction, it is necessary to pay attention to whether there is an electric field, etc. If all the conditions are met, the reaction is bound to occur.

First of all, you need to know what types of reactions there are, and secondly, you need to determine which type of reaction you belong to. Just pay attention to the nature of the phylum, acidity and alkalinity, and what substances it does not react with. I wish you a speedy success.

There is the formation of water, gas, precipitation, weak acid, and weak base, which are necessary conditions for the occurrence of redox reactions, and then there are valency rises and falls, and electrons are transferred. As for sodium sulfate and sulfur dioxide, they cannot react because the sulfur element in them has no intermediate valence state. Not as it was said upstairs.

: Sodium sulfate and sulfur dioxide.

How to know if they can react to each other.

No. Salts should not react with non-metallic oxides.

K2CO3 + 2HCl = 2KCl + CO2 + H2O, which emits a large amount of gas.

CO2 + Ca (quietly withered OH) 2 = CaCO3 + H2O, resulting in a spike hand white precipitate.

CO+CUO=Heating=CO2+CU, the black solid gradually turns red.

3CO+FE2O3=High temperature=2FE+3CO2, the red solid suspect gradually turns black, and the Fe particles are black.

CH4 + 2O2 = ignition = CO2 + 2H2O

It glows and heats, and the flame is pale blue.

2C2H2 + 5O2 = Ignition = 4CO2 + 2H2O Luminescence and Heat, with black smoke (the mass fraction of C in C2H2 is too large, C can not be completely reacted, and C particles will be generated).

4Fes2 + 11O2 = 2Fe2O3 + 8SO2 The object gradually changes from black to reddish-brown.

The phenomenon of 2HCl+CaCO3===CaCl2+CO2+H2O --- bubbles, producing colorless and odorless gas.

HCl+AGNO3===AGCL+HNO3 phenomenon produces white precipitate ----

The phenomenon of H2SO4+Na2CO3===Na2SO4+CO2+H2O --- bubbles, and the gas -H2SO4+BAC2====BaSO4+2HCl phenomenon produces a colorless and ignorant slag smell--- resulting in a quiet white precipitation.

2hno3+na2co3===

The phenomenon of nano3+CO2+H2O ---

There are bubbles, which produce a colorless and odorless gas-

ca（clo）2

co2h2o

caco3↓+

2HCO activated carbon is adsorbent.

Chlorine water is bleaching.

cl2+h2o--hcl+hclo

HCO can be used to kill viruses.

Sodium swims at high speed on the surface of the water.

There are bubbles that turn into a brownish-yellow solution.

2na+2h2o=2naoh+h2↑

fecl3+3naoh=fe（oh）3↓+3nacl6na+2fecl3+6h2o=2fe（oh）3↓+6nacl+3h2↑

Give more points!!

Laboratory hydrogen is produced by reacting the metal with hydrochloric acid or dilute sulfuric acid before hydrogen in the metal activity sequence table. (except potassium, calcium and sodium). Manganese dioxide is used as a catalyst to heat and decompose potassium chlorate to produce oxygen, and potassium chloride is also generated.

The solute of lime water is calcium hydroxide, which reacts with dilute hydrochloric acid to form calcium chloride and water. Reaction of limestone or marble with dilute hydrochloric acid to produce carbon dioxide gas also produces calcium chloride and water. These are all very important chemical reactions.

The reaction equation is as follows: Fe+2HCl=FeCl2+H2

kclo3=kcl

Hydrogen is produced in the laboratory by reacting zinc with dilute sulfuric acid.

zn ten h2 so4 zns04 ten h2

Hydrogen peroxide produces oxygen.

2h2o2 mno2 2h2o ten o2

Reaction of hydrochloric acid with lime water.

2HCI deca ca(OH)2 CAC12 deca 2H2O laboratory test carbon dioxide.

Ca(OH)2 deca CO2 dica caCO3 deca h2o