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2kmNO4 = (heating) MNO2 + O2 (gas symbol) + K2MNO42KCLO3 = (manganese dioxide catalyst) 2KCl + 3O2 (gas symbol) Carbon dioxide: Ca2CO3 + 2HCl (dilute) = 2CaCl2 + CO2 (gas symbol) + H2O

Chlorine: mno2 + 4HCl (concentrated) = mnCl2 + Cl2 (gas symbol) + 2H2O

2kmNO4 = (heating) K2mNO4 + MNO2 + O2 (rise).

CaCO3 + 2HCl = CaCl2 + CO2 (rise) + H2O

I don't know about chlorine.

2H2O2 = (mNO4) 2H2O+O2 (rise) 2kmNO4 = (heating) K2mNO4 + MNO2 + O2 (rise) (both are OK).

CaCO3 + 2HCl = H2O + CO2 + CaCl24HCl (concentrated) + MNO2 (heated) = 2H2O + MnCl2 + Cl2 (rising).

Lose the electronic posture book, and the combination of the cherry blossom price rise Zen book can only be on it!

Guess three cu cuo mgo

**Medium Some of the red solids are undissolved and the solution turns blue.

Mg+CuO=High temperature=MGO + Cu replacement.

Reflection and Expansion Product: Reactant Not necessarily.

5. K2CO3 potassium carbonate is carbonate and is a weak electrolyte.

Hydrolysis: CO32- +H2O --OH- +HCO3- reacts extremely slowly... Not a reaction, but hydrolysis. Hydrolysis of salts 4, you wrote it wrong.

Silver sulphate is Ag2SO4 and silver chloride is AgCl and not AgCl2

Your teacher can go home and plow the fields. Sulfate and chloride ion belong to the same strong acid 6, which is also wrong. I find ... Why do you seem to be playing tricks on me?

Cuo+2HCl===CuCl2+H2O**CO2 silver sulfate is slightly soluble. If you want to talk about reaction, it makes sense.

It is not possible for H2 and O2 to ignite to form H2O2, but C+O2 can generate CO because it is not completely combusted.

1 can not react, 2 can, 3 can under certain conditions, such as CaSO4 or 2HCl, because CaSOs are slightly soluble, HCl can be gas out, to prepare HCl gas in the laboratory, the NaCl used can be replaced by CaCl 2, but after replacing with CaCl2, the CaSO4 generated by the reaction will be wrapped outside to prevent further reaction. 4 reactions can be carried out, although Ag2SO4 is slightly soluble. 5 no, 6?

7 depends on the situation, 8?

1: Not established (no water, gas, precipitation).

2: Establishment (with water, gas generation).

3: Establishment (precipitation generation) (calcium carbonate microsoluble).

4: Established (there is precipitation generated) (you wrote the wrong agcl, right) (strong acid and weak acid have no relationship, they are all ions after dissolving in water, silver ions and chloride ions react, there is no conflict between them and acid).

5: The reaction formula of macro ** is not reactable, K2CO3 is a strong electrolyte, and there is no reaction when dissolved in water.

There is a following equilibrium under the microscopic level: K2CO3+H2O<=>CO2+2Koh, but it is also a very small amount, so the whole reaction formula can be regarded as non-reaction.

6.The equation is wrong cuo+2HCl=H2O+cuCl2

7: Not established (no water, gas, precipitation generated).

8: CuCl2+2koH=Cu(OH)2(precipitate)+2kCl

In fact, if there are 2 reactants, both positive and negative ions can be exchanged (some are more special, you need to look at more).

For example, 3FeS2+12C+8O2====(Calcination)Fe3O4+12Co( )6S( )

You have to look at it a lot, and you have to judge the oxidant and reducing agent, so that you can know what is produced more effectively, and then you can judge the product.

As for: acid + base = neutralization + water This is the basic of junior high school chemistry There is no inevitable formula for high school chemistry.

There is a rule in organic chemistry (CXHyoz+(X+Y4-Z2)O2=(ignition)=XCo2+(Y2)H2O

Hope it helps.

Solution: Let the mass of sulfuric acid (solute) in dilute sulfuric acid be x

zn + h2so4 = znso4 + h2↑65 98

13g xx = mass of solvent in dilute sulfuric acid =

J let the mass of zinc sulfate formed by the reaction be y

zn + h2so4 = znso4 + h2↑65 16113g yy=

The quality of the resulting solution =

where the mass of the solute is the mass of zinc sulfate, ie.

The quality of the solvent is the quality of the water contained in the sulfuric acid, ie.

zn+ h2so4= znso4+ h2

13g x = y = z = the mass of solute and solvent in dilute sulfuric acid, the mass of the resulting solution is 100+ and the mass of solute, solvent is 93g.

If zinc and sulfuric acid react 1:1, then there is H2SO4 in 100g of sulfuric acid, then solute, solvent.

To obtain a solution containing ZnSO4, the solute, solvent is 13+, which is the mass of the hydrogen that escapes.