Question

Помогите пожалуйста,СРОЧНО1.Дать названия веществам,расставить валентности:KOH,SiO2,Fe(OH)3,H2SO3,HgO,CaCo32.За... http://znanija.com/task/19595266?utm_source=android&utm_medium=share&utm_campaign=question

Answer 1

K(1)O(2)H(1) - гидроксид калия

Si(4)O(2) - оксид кремния

Fe(3)O(2)H(1) гидроксид железа

H(1)S(4)O(2) - сернистая кислота

Hg(2)O(2) - оксид ртути

Ca(2)C(4)O(2) - карбонат кальция

Answer 2

Naming Substances and Assigning Valencies:

1. KOH: The substance is called potassium hydroxide. The valency of potassium (K) is +1, and the valency of hydroxide (OH) is -1. Therefore, the valency of KOH is +1 for potassium and -1 for hydroxide.

2. SiO2: The substance is called silicon dioxide. The valency of silicon (Si) is +4, and the valency of oxygen (O) is -2. Therefore, the valency of SiO2 is +4 for silicon and -2 for oxygen.

3. Fe(OH)3: The substance is called iron(III) hydroxide. The valency of iron (Fe) is +3, and the valency of hydroxide (OH) is -1. Therefore, the valency of Fe(OH)3 is +3 for iron and -1 for hydroxide.

4. H2SO3: The substance is called sulfurous acid. The valency of hydrogen (H) is +1, and the valency of sulfite (SO3) is -2. Therefore, the valency of H2SO3 is +1 for hydrogen and -2 for sulfite.

5. HgO: The substance is called mercury(II) oxide. The valency of mercury (Hg) is +2, and the valency of oxygen (O) is -2. Therefore, the valency of HgO is +2 for mercury and -2 for oxygen.

6. CaCO3: The substance is called calcium carbonate. The valency of calcium (Ca) is +2, and the valency of carbonate (CO3) is -2. Therefore, the valency of CaCO3 is +2 for calcium and -2 for carbonate.

Please note that these are the common valencies for the elements mentioned. Valencies can vary depending on the specific compound or context.