Advertisements
Advertisements
Question
Write the formula of the following compound:
Zinc nitrate
Advertisements
Solution
Zinc nitrate - Zn[NO3]2 - `"Zn"^(2+)["NO"_3]^(1-)`
APPEARS IN
RELATED QUESTIONS
Explain the difference between 2N and N2.
The formula of a compound is X3Y. The valencies of elements X and Y will be respectively :
Give the formula and valency of:
| Aluminate | ______ | ______ |
Give the formula and valency of:
chromate ………….…….. .
XCl2 is the chloride of a metal X. State the formula of the sulphate and the hydroxide of the metal X.
Name the element in the compound and give the formula of the following compound:
Nitric acid
Name the element in the compound and give the formula of the following compound:
Green vitriol
Write the formula of the following compound:
Sodium hydroxide
Write the formula of the following compound:
Calcium carbonate
Write the formula of the following compound:
Magnesium chloride
Write the formula of the following compound:
Aluminium carbonate
Write the formula of the following compound:
Aluminium oxide
Write the formula of the following compound:
Copper [II] nitrate
Write the formula of the following compound:
Iron [III] hydroxide
Write the formula of the following compound:
Lead [II] chloride
Write the formula of the following compound:
Lead [II] hydroxide
Complete the following crossword puzzle (Fig. 3.1) by using the name of the chemical elements. Use the data given in Table.
| Across | Down | ||
| 2 | The element used by Rutherford during his α–scattering experiment | 1 | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air |
| 3 | An element which forms rust on exposure to moist air | 4 | Both brass and bronze are alloys of the element |
| 5 | A very reactive non–metal stored under water | 6 | The metal which exists in the liquid state at room temperature |
| 6 | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8 | An element with symbol Pb |

Derive the chemical formula for calcium chloride.
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:

The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
