Does the presence of sulfate or carbonate indicate that the solution is acidic?

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Of course not, for example, if the sodium sulfate solution is neutral, it contains sulfate, and the sodium carbonate solution contains carbonate, but the sodium carbonate is alkaline. There are many such examples, and I won't list them all!

No, because the acidity is not based on acid ions, but on the amount of hydrogen ions, which is specialized in the second year of high school.

The acidity and alkalinity of the solution can not only look at what ions there are, the acidity and alkalinity of the solution is to look at the concentration of H+ in the solution, and oh- in the solution, if.

If the concentration of H+ is greater than the concentration of OH-, the solution is acidic, and vice versa.

As in the question: sodium sulfate containing sulfate, which is neutral, sodium carbonate containing carbonate, he is still alkaline.

No, it depends on the relative content of hydrogen ions and hydroxide ions in the solution.

Of course not, the acidity and alkalinity depend on the content of hydrogen ions in the solution.

It shows that the acidity of the solution depends on the amount of H+ ions.

Flame deficiency bicarbonate is a weakly acidic acid acid, which is incompletely ionized into bicarbonate in an aqueous solution and will be hydrolyzed into carbonic acid. When it reacts with acid, carbonic acid is formed, and carbonic acid is easily decomposed to form water and carbon dioxide, and carbon dioxide mostly escapes in the form of gas. When it reacts with alkali, carbonate and water are generated, and when it reacts with calcium ions and barium ions, carbonate combines with ions to form a precipitate.

The presence of hydrogen sulfur and silver acid in water is very small, and it is completely ionized to form hydrogen ions and sulfate, so it does not react with strong acids, reacts with weak acids or acid acids, neutralizes with alkalis, and reacts with volvo void acid salts, basic salts and barium salts.

h2so3>h2co3>hso3->hco3-co32-+so2+h2o=hco3-+hso3-.This equation is when SO2 and Na2CO3 react at 1:1.

Strong acid Weak acid.

Then pass into SO2:

hco3-+so2+h2o=co2+h2o+hso3-.

Strong acid Weak acid.

It coexists under normal conditions, but not under acidic conditions, because sulfur dioxide is generated. na2so3+h2so4=na2so4+so2+h2o.[Industrial sulphur dioxide].

The judgment of the coexistence problem of coexistence in solution is based on the following:

Ions combine with each other to generate: microsolubles, intolerant substances, gases, and weak electrolytes cannot coexist in large quantities!

When judging, you should pay attention to the conditions given by the question (sometimes implied when given).

1.If the problem is limited to a colorless solution, then: Cu2+, Fe2+, Fe3+, and Mno4- cannot exist.

2.The title is limited to acidic conditions: then: CO3 2-, SO3 2-, S2-, and other weak acid ions cannot exist.

3.The topic is limited to strong alkaline conditions: then: NH3+, Al+, Mg2+, Fe3+ and other strong alkaline cations cannot exist.

4.Special ions cannot be present.

How to measure the solution of sulfate and sulfite at the same time Take a 10ml sample, add a buffer solution, and then add barium chloride to precipitate, and measure the absorbance for 5 minutes Before doing the marking, I don't know that the concentration of 30% hydrogen peroxide I added when I was oxidizing sulfite was too high, which would have an impact on the precipitation of barium sulfate.

Summary. Hello, your question should be to test your chemical equation.

You need to put about bicarbonate, hydrogen phosphate, sulfate, sulfite, sulfur anion, sobanoate, permanganate. Find out the chemical equations of these, then make a table, and then compare the provided reagents one by one to see which and which will react with each other, so that they can be proved one by one.

It is unknown how to test the resistance of bicarbonate, hydrogen phosphate, sulfate, sulfite, sulfur anion, chromate, and permanganate in the solution. The solution is neutral、How to design experiments to test that spike hand some ions present those who are not present、Chang oak clear steps。 As shown in Fig.

Hello, your question should be to test your chemical equation. You need to put about bicarbonate, hydrogen phosphate, sulfate, sulfite, sulfur anion, sobanoate, high match round manganate. Find out the chemical equations of these, and then make a table, and then compare the provided reagents one by one to see which one and which will react with each other, so that you can prove the auspiciousness one by one.

Can you help me design this test.

These are two experiments.

** There is a solution given.

Hello, Split Hui can refer to the book test 46, I will give you an example, for example, these two dissolved liquid react with each other, the source is precipitation, then it can be proved that there is indeed this solution. I won't help you with specific examples.

There is also a reaction between two solutions to produce gas and water, what is the smell of gas, so it can also indicate that there is something in the solution.

First of all, it is necessary to make it clear that barium sulfate is insoluble in water, but barium carbonate is also insoluble in water, and barium sulfite is also insoluble in water.

Here's how to do it correctly:

HCL is first added to the solution for acidification to acidity, if there is no gas or precipitation (in fact, it doesn't matter, it is important to remove carbonate and sulfite from the solution), and then add barium chloride to the solution, if a precipitation is generated, it indicates that the solution contains sulfate ions.

First of all, the influence of carbonate is excluded, and then barium nitrate is dropped after hydrochloric acid, and if it produces sedimentation, it proves that there is sulfate.

BaCl2 was added to the solution, and the resulting white precipitate was insoluble in dilute nitric acid, which proved that there were sulfate ions in the original solution.

At high school, bisulfate is considered to be sulfate and hydrogen ions in solution, and has the same chemical properties as sulfate and hydrogen ions.

1.Acidic: reacts with OH (-) CO3 (2-) 2Precipitate bicarbonate is produced with metal ions such as BA(2+), AG(+).

1.Reacts with h(+).

2.Reacts with oh(-).

3.Double hydrolysis occurs with Al(3+) and others.

Bisulfate: It can react with carbonate, bicarbonate (ionization of hydrogen ions), barium ions, and precipitate. Bicarbonate: Hydroxide (to produce carbonate and water).