Chemistry - Valence Structure

What is the oxidation number for Ba?

+2

What is the oxidation number for Cl?

-1

In the example in the lesson, 0.10 mole of sodium chloride or magnesium chloride or aluminum chloride was added to one liter of water. How many moles of each chloride are in one milliliter of the respective solutions?Hint: There is 0.10 mole per liter. Recall how many milliliters are in a liter and divide 0.10 by that number. (Remember to use the proper number of significant figures.)

0.00010 moles/mL

Assume that you measured exactly 2.0 mL of the sodium chloride solution into a small test tube. How many moles of sodium chloride are in the tube?

0.00020 moles

Now assume you measure out exactly 2.0 mL of aluminum chloride into a third test tube. How many moles of aluminum chloride are in the tube?

0.00020 moles

How many valence electrons does calcium have?

2

Balance the following equation. ___ AlCl 3 + ___ AgNO 3 → ___ AgCl + ___ Al(NO 3 ) 3

Blank 3 3 blank

An ion is an atom with a net electrical charge due to ______.

Both of the above

Balance the following equation. ___ MgCl 2 + ____ AgNO 3 → ____ AgCl + ____ Mg(NO 3 ) 2

blank 2 2 blank

How could Cl change to gain stability?

gain 1 electron

How would Mg change to gain a noble gas structure?

lose 2 electrons

What would barium do to obtain a noble gas structure?

lose 2 electrons

How would B change to gain stability?

lose 3 electrons