Advice 1: How to write the equation of interaction of acids with alkalis

The ability to write equations of the chemical reaction, for example, interaction of acids with alkalismay be useful during the practical works, laboratory experiments, and in testing during the exam in chemistry.
How to write the equation of interaction of acids with alkalis
You will need
  • The table of solubility of acids, salts, bases
Acid is complex substances that consist of atoms of hydrogen and acidstion of residues, for example, hydrochloric (HCl), sulfuric (H2SO4), nitric (HNO3).
The Foundation is a complex substances that consist of atoms of metals and of hydroxyl groups. Water soluble bases are called alkalis. These include such compounds as sodium hydroxide (NaOH), calcium hydroxide (Ca(OH)2), potassium hydroxide (KOH), and others. Their solubility can be determined according to the table, as it is reference material, which along with the table of D. I. Mendeleev required on all types of control, including the exam in chemistry (in each CIMA).
The interaction of acids with alkalis is otherwise known as neutralization reaction, so as to produce salt and water. The salt may be formed as the middle, and sour. Also similar to the interaction of substances can be attributed to the exchange reaction because of the acids and alkalis are exchanged between its constituent parts.
Example No. 1. Write the reaction equation of interaction of hydrochloric acidwith sodium hydroxide. In this reaction an atom of hydrogen in hydrochloric acid (HCl) changes places with the sodium atom in the alkali - sodium hydroxide (NaOH). The result is a salt – sodium chloride (NaCl) and water (H2O). Thus, the alkali neutralized the acid. In this reaction equation arrange the coefficients is not necessary, as the number of atoms of each element that is included as original substances and reaction products, is the same. HCl + NaOH = NaCl + Н2ОАналогично, without the coefficients will look like the equation, if for the reaction to take of nitric acid (HNO3) and potassium hydroxide (KOH).HNO3 + KOH = KNO3 + H2O
Example No. 2. Write the reaction equation of interaction of sulfuric acid, (H2SO4) with calcium hydroxide (Ca(OH)2). In this reaction equation 2 hydrogen atoms of sulfuric acid, (H2SO4) menyayutsya one calcium atom included in alkali – calcium hydroxide (Ca(OH)2). Asáaáresult, the formed salt is calcium sulfate (CaSO4) and water (H2O). Arrange the necessary factors by the method of substitution, increasing the number of water molecules to 2.H2SO4 + Ca(OH)2 = CaSO4 + 2H2O
Example No. 3. Write the reaction equation of interaction of sulfuric acid, (H2SO4) with sodium hydroxide (NaOH). If a job is not specifically set forth the conditions of the reaction, it is assumed that salt will be formed only average - in this case sodium sulfate (Na2SO4).H2SO4 + 2NaOH = Na2SO4 + 2Н2ООднако if the condition says that the reaction occurs with an excess of acids (or concentrated), in this case, a salt acid – hydrosulfate sodium (nahso4 solution)H2SO4 + NaOH = nahso4 solution + 2H2O
In the arrangement of the coefficients remember that the number of atoms of each element of the original substances must be the same number of atoms of the elements in the reaction products.

Advice 2: How to neutralize phytic acid in cereals

As soon as it comes about healthy eating or losing weight, all the first to remember about the benefits of oatmeal. However, due to its high concentration in phytic acid nutritionists advise to drink oatmeal more often than 2 times a week. Because this insidious acid "steals" calcium from the body.
How to neutralize phytic acid in cereals

In fact, phytic acid contained not only in oatmeal. Any whole grains, legumes, raw seeds and nuts, wheat germ abound in this antinutrient. Especially a lot of phytic acid in the bran. I must say that the above are the most useful, healthy foods is essential to everyone. But everything is good in moderation. We proceed to the detriment of phytic acid begins only when accumulated in the body a fair amount.

It interacts, if it failed to neutralize in the process of cooking food, in the intestine with calcium, magnesium, phosphorus, zinc, copper, iron, and inhibits their absorption by the body. To the above-mentioned, phytic acid inhibits the activity of enzymes that are designed to break down protein.

Therefore, you should think seriously before to go on a strict diet of oatmeal water, beans and raw nuts. As a result, you allow your body to demineralization. However, it is not necessary to panic. You just need to comply with the measure and learn how to cook whole grains. That is, previously to ferment.

Ruminants in the rumen produce a special enzyme - picazo, which promotes better assimilation of phytic acid. The human intestinal microflora also has this ability, but in much smaller amounts. The production of phytase can be activated in the grains that occurs during the long soak (12-24 hours).

But keep in mind that you cannot soak grits before cooking in hot water, because when temperatrue 80 degrees phytase will be destroyed in just 10 minutes, and the effect will be. the water should be komnenoi temperature or 40 degrees. Better the fermentation in an acidic environment, so you can add a few drops of lemon juice or malic acid.

Different grains are able to allocate different amounts of phytase to phytic acid destruction. So, oats, corn, millet, brown rice, even during prolonged soaking is not able to eliminate all the phytic acid. Therefore, you should at least eat these products. And cook them only after daily soaking.


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