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6.2 Ionic Compounds
Write the correct formula using charge balance.
Every day, we use ionic compounds such as salt, NaCl, and baking soda.
Milk of magnesia, Mg(OH)2, or calcium carbonate, CaCO3 may be taken to settle an upset stomach.
In a mineral supplement, iron may be present as iron(II) sulfate, FeSO4 and KI.
Zinc oxide, ZnO, is found in some sunscreens, while tin(II) fluoride, SnF2, is found in toothpaste.
Gemstones are ionic compounds that are cut and polished to make a compound.
The aluminum oxide in sapphires and rubies is Al2O3.
There are iron and titanium ion that make rubies red and sapphires blue.
The physical and chemical properties of an ionic compound are very different from those of the original elements.
The original elements of NaCl were sodium, a shiny metal, and chlorine, a yellow-green poisonous gas.
Ordinary table salt is important in our diet because it is a hard, white, crystal substance.
Every Na+ ion is surrounded by six Cl- ion in this crystal.
There are many attractions between the positive and negative ion, which account for the high melting points of ionic compounds.
The melting point of NaCl is 800 degC.
Ionic compounds are solid at room temperature.
The compound that makes up table salt is formed when the elements sodium and chlorine react.
The sum of the ionic charges in the formula is always zero.
To achieve a stable electron arrangement, one Na atom loses one electron to form Na+, and one non-metal atom gains one electron.
The compound has charge balance because there is one Na+ for every chloride ion.
The formula of the compound does not show the positive or negative charged ion.
There is a compound of magnesium and chlorine.
To achieve a stable electron arrangement, one Mg atom loses its two electrons.
Two non-metals gain one electron to form two strontium strontium strontium strontium strontium strontium strontium strontium strontium strontium strontium stron There is a positive charge of Mg2+.
The subscript 2 shows that two Cl- ion are needed for charge balance.
The number of positive and negative ion that give an overall charge of zero is represented by the subscripts in the formula of an ionic compound.
We can write a formula from the positive and negative ion charges.
Suppose we want to write a formula for the ionic compound.
The overall charge of the formula is zero.
The cation is first followed by the anion in the formula of an ionic compound.
The number of the ion is shown in appropriate subscripts.
The lowest ratio of ion in the compound is found in this formula.
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