# Ion and pb2 ions

The sodium exchanged ions existing in zeolite were measured by a potentiometric technique, based to the measure of the potential of selective sodium electrode. The ion effect on the exchange percentage of zeolite Na-Y was study. Kinetic, equilibrium and thermodynamic studies were also carried out. The obtained results show that zeolite Na-Y is effective in the recovery of the studied ions. Solubility and Net Ionic Equations Net ionic equations are useful in that they show only those chemical species participating in a chemical reaction. The key to being able to write net ionic equations is the ability to recognize monoatomic and polyatomic ions, and the solubility rules.

The following solubility rules predict the solubility of many ionic compound when applied in order: All Cl- Br- and I- salts are soluble. All SO salts are soluble. Let's first start with a complete chemical equation and see how the net ionic equation is derived. Take for example the reaction of lead II nitrate with sodium chloride to form lead II chloride and sodium nitrate, shown below: Rule 2 confirms that lead II nitrate is soluble and therefore dissociated.

## (1) Fe2+ (3) Pb2+ (2) Mg2+ (4) Zn2+

Rule 1 says the same about NaCl. As products, sodium nitrate is predicted to be soluble rules 1 and 2 and will be dissociated. The lead II chloride, however, is insoluble rule 3.

The above equation written in dissociated form is: Notice how the nitrate ions and sodium ions remain unchanged on both sides of the reaction.

## Variations

For instance, suppose you had to determine the net ionic equation resulting from the reaction of solutions of sodium sulfate and barium bromide: One way to tackle this problem is to examine what ions are found together in solution: We know that barium ions and bromide ions are soluble together rule 4but will sodium ions or sulfate ions combine with barium ions to form an insoluble compound?

Barium ions and sodium ions, both being positive in charge will repel each other, so no compound is expected to form between them. On the other hand, sulfate ions and barium ions would form barium sulfate insoluble; rule 6. The sodium ions must therefore combine with bromide ions to form sodium bromide.

According to the solubility rules, sodium bromide should be soluble rule 1. Now we can write a complete balanced equation:ACTIVITY OF IONS IN SOLUTION Which flask will be more acidic?

Flask 1 M HCl Flask 2 Ion-ion and ion-H2O lausannecongress2018.com activity is a result of ionic strength In solution the cationPb2+ (ion with a + charge) is surrounded by all ions (K+, Pb2+, NO3-, I-).

More anions (ions with a -charge) will surround Pb2+ then cations. Naming Simple Cations Monatomic cations bear the same names as their elements, with the addition of the word ‘ion’. Many elements (such as sodium and calcium) have only one stable form of . A Qualitative Analysis for Select Cations To learn about Precipitation Equilibria. To learn about Complex Ion Formation.

 Technical Data Department of Chemistry and Biochemistry, Stephen F. The Effect of the Formation of Complex Ions on Solubility Ammonia gas is evolved because alkali frees ammonia from its salts.

Another trick is to form complex ions of the Cation. For example, in an Ammonia (NH 3) solution, Ag+, forms an Ag(NH 3) 2 + complex. A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers.

Ion-exchange chromatography is a form of liquid chromatography in which the stationary phase is an inert polymer that is derivatized with charged groups that can bind (exchange) ions of opposite charge. sider the coordination number of Pb2 to be equal to 7 (“umbrella” of five chlorine ions with R ≈ nm and two ions with distances of and nm).