Given the known compounds--- CO2,KF,MgO,CaCL2,Na2O,Ga2O3 and AICl3- predict tbe formula for the following combinations of elements.
1.Si and O ____
2.Ba and S______
3.K and S________
4.B and F_________
5.Li and Br________
6.Sr and O__________
Thanks for the help!
I will be happy to critique your thinking.
What do you mean?
That means we don't want to do your homework for you but we will be happy to check your thoughts. Also if you have specific questions about how to do this we can help. For example, b is K and S. K is in group I and has a valence of +1, S is in group VI and has a valence of -2. The formula, then, is K2S.
To predict the formula for the combinations of elements, we need to consider the charges of the ions and balance them in order to obtain a neutral compound.
1. Si and O:
Looking at the known compounds, we see that CO2 and MgO both contain oxygen. Oxygen typically forms an ion with a charge of -2.
Silicon, on the other hand, typically forms an ion with a charge of +4. In order to create a neutral compound, we need to balance the charges. This means we need two oxygen ions to balance the charge of one silicon ion. Therefore, the formula for this combination is SiO2.
2. Ba and S:
Looking at the known compounds, we see that KF contains fluorine, which typically forms an ion with a charge of -1.
Sulfur, on the other hand, typically forms an ion with a charge of -2. In order to create a neutral compound, we need two fluoride ions to balance the charge of one sulfur ion. Therefore, the formula for this combination is BaF2.
3. K and S:
As mentioned earlier, sulfur typically forms an ion with a charge of -2. Potassium, on the other hand, typically forms an ion with a charge of +1. In order to create a neutral compound, we need two potassium ions to balance the charge of one sulfur ion. Therefore, the formula for this combination is K2S.
4. B and F:
Fluorine typically forms an ion with a charge of -1. Boron, on the other hand, typically forms an ion with a charge of +3. To balance the charges, we would need three fluoride ions to balance the charge of one boron ion. Therefore, the formula for this combination is BF3.
5. Li and Br:
Bromine typically forms an ion with a charge of -1. Lithium, on the other hand, typically forms an ion with a charge of +1. In order to create a neutral compound, we need one lithium ion to balance the charge of one bromine ion. Therefore, the formula for this combination is LiBr.
6. Sr and O:
As mentioned earlier, oxygen typically forms an ion with a charge of -2. Strontium, on the other hand, typically forms an ion with a charge of +2. To balance the charges, we would need one oxygen ion to balance the charge of one strontium ion. Therefore, the formula for this combination is SrO.
I hope this explanation helps you understand how to predict the formulas for combinations of elements!