Question

Почему NaCl+Ba(NO3)2 KOH+NaCl

Answer 1

Для того,чтобы шла обменная реакция между солями должен выпадать осадок,а иначе получтся смесь двух растворов солей,которые невозможно разделить.
1)2NaCl+Ba(NO3)2=2NaNO3+BaCl2.
Осадок не выпадает(и нитрат натрия и хлорид бария достаточно хорошо растворимы в воде),следовательно,реакция не идет.
2)KOH+NaCl=KCl+NaOH.
Осадок не выпадает(гидроксид натрия-щелочь,а значит хорошо растворим в воде, хлорид калия тоже хорошо растворим в воде),значит реакция идти не может.

Answer 2

NaCl, Ba(NO3)2, and KOH are all chemical compounds with different properties and uses.

NaCl is the chemical formula for sodium chloride, commonly known as table salt. It is a white crystalline solid that is highly soluble in water. NaCl is widely used as a seasoning and preservative in food, as well as in various industrial processes such as water treatment, chemical production, and manufacturing.

Ba(NO3)2 is the chemical formula for barium nitrate. It is a white crystalline solid that is also highly soluble in water. Barium nitrate is commonly used in the production of fireworks and pyrotechnics due to its ability to produce green flames when burned. It is also used in the manufacture of other barium compounds, glass, and ceramics.

KOH is the chemical formula for potassium hydroxide, also known as caustic potash. It is a white solid that is highly soluble in water and forms a strong alkaline solution. KOH is used in various applications such as soap and detergent production, as a laboratory reagent, in the manufacture of batteries, and in the production of biodiesel.

As for the combination of NaCl, Ba(NO3)2, and KOH, it seems that you have listed them together without any specific context or purpose. If you provide more information about the context or what you would like to know about these compounds, I would be happy to provide a more detailed answer.