1. Name the following covalent compounds.
a. SiO2 silicon dioxide
b. CS2 carbon disulfide
c. NO nitrogen monoxide
d. PCl3 phosphorus trichloride
e. PF5 phosphorus pentafluoride
2. First figure out if the compound is covalent, regular ionic or an ionic compound with a transition metal. Then name it appropriately.
a. PCl5 phosphorus pentachloride
b. KBr potassium bromide
c. CuSO4 copper sulfate
d.. PI3 phosphorus triodide
e. K2CO3 potassium carbonate
f. NH 4I ammonium iodide
3. Write formulas for the following:
a. magnesium phosphate Mg3(PO4)2
b. lithium hydrogen carbonate LiHCO3
c. diphosphorus pentoxide P2O5
d. silicon tetrachloride SiCl4
e. calcium hydroxide Ca(OH)2
f. sodium fluoride NaF
g. nitrogen trifluoride NF3
4. The scum-producing reaction between soap and Ca+2 can be represented by:
Ca+2 + NaC17H35CO2 à Ca(C17H35CO2)2 + 2 Na+1
From the above formulas, determine the charge of the stearate(C17H35CO2) polyatomic ion.
Use any of the compounds containing C17H35CO2.
Let x = charge of C17H35CO2 ;
But calcium is +2, and the charges have to add up to zero, so:
2x + 2 = 0
x = -1