Recovery for Polyatomic Rules assignment

Name this: H4C

• hydrogen chloride

• methane

• chloric acid

• hydrogen carbide

• tetrahydrogen carbide

Answer explanation

If you chose hydrogen chloride, there's no l in the formula, that's carbon, not chlorine. If you chose methane, please explain to me how you learned organic chemistry. If you chose chloric acid, where have you ever heard of that? If you chose tetrahydrogen carbide, I can understand that, it's tricky! Hydrogen is in the front, so it's acting like a metal.

Name this: H2SO4

• hydrogen sulfur oxygen

• sulfone

• sulfuric acid

• hydrogen sulfite

• hydrogen sulfate

Answer explanation

If you chose hydrogen sulfur oxygen, nothing in this class has 3 names. As soon as you see the third element, you should look at your polyatomic ion sheet. If you chose sulfuric acid, please explain to me how you learned the acid naming rules and explain them to me. If you chose sulfone when did you study organic chemistry? If you chose hydrogen sulfite, I can understand that, it's tricky! Sulfate is SO4, sulfite is SO3

Name this: AgNO3

• argon nitride

• argon nitrate

• silver nitrogen oxygen

• silver nitrate

• argon nitrogen oxygen

Answer explanation

No compound in this class will have three names; as soon as you see the third element, you should go for your polyatomic ion sheet. Ag is silver, not argon - easy mistake to make, but one you have to be aware of!

Name this NH3

• ammonium

• ammonia

• nitrogen hydride

• nitrogen trihydride

• nitrogen hydrogen

Answer explanation

If you chose ammonium, you're close but no. Ammonium is NH4. If you chose nitrogen hydrogen, remember that the last name always ends in -ide or -ite or -ate. If you chose nitrogen hydride, remember that these are both non-metals, so you need a prefix. If you chose ammonia, you need to start using your brain and your notes instead of google.

choose the formula for hydrogen peroxide

• HO

• (H2) (O2)

• HO2

• H2O2

• H2 O2

choose the formula for sodium bicarbonate

• Na2CO3

• (Na) (HCO3)

• NaHCO3

• Na(CO3)2

• Na HCO3

Answer explanation

Stop putting spaces in chemical formulas.

Don't use parentheses unless you need multiple copies of a polyatomic ion.

Balance the charges - the charges are listed at the top of the column on the polyatomic ion sheet; you don't have to calculate them. The number of oxygens isn't the charge and it isn't the number of copies of that ion; it's just the number of oxygens in that ion.

Polyatomic ions don't use prefixes, so "bicarbonate" doesn't mean 2 carbonates. It's a separate ion - it's in the -1 column, towards the top.

choose the formula for beryllium carbonate

• Be2CO3

• (Be) (CO3)

• BeCO3

• Be3(CO3)2

• Be2(CO3)4

Answer explanation

Stop putting spaces in chemical formulas.

Don't use parentheses unless you need multiple copies of a polyatomic ion.

Balance the charges - the charges are listed at the top of the column on the polyatomic ion sheet; you don't have to calculate them. The number of oxygens isn't the charge and it isn't the number of copies of that ion; it's just the number of oxygens in that ion.

choose the formula for aluminum sulfite

• Al2SO3

• Al SO3

• Al2(SO3)3

• Al2S3

• Al2 (SO4)3

Answer explanation

Stop putting spaces in chemical formulas.

Don't use parentheses unless you need multiple copies of a polyatomic ion.

Balance the charges - the charges are listed at the top of the column on the polyatomic ion sheet; you don't have to calculate them. The number of oxygens isn't the charge and it isn't the number of copies of that ion; it's just the number of oxygens in that ion.

choose the formula for ammonium hydroxide

• NH4 OH

• NH4+1 OH-1

• (NH4)(OH)

• NH4(OH)4

• NH4OH

Answer explanation

Stop putting spaces in chemical formulas.

Don't use parentheses unless you need multiple copies of a polyatomic ion.

Balance the charges - the charges are listed at the top of the column on the polyatomic ion sheet; you don't have to calculate them.

Y'all - +1 is the charge of the ammonium ion. We don't put the charge in formulas. None of you have written Na+1 Cl-1 or Ca+2 Cl2 -2! STOP PUTTING AMMONIUM'S CHARGE IN THE FORMULA

Ammonium has 4 hydrogens; it doesn't have a charge of $

Name this HCo3

• hydrogen carbide

• hydrogen carbon oxygen

• this isn't a correctly written formula and we can't name it but it contains hydrogen and cobalt

• hydrogen carbonate

Answer explanation

Co is cobalt, it isn't carbon nor is it carbonate. That lower case O makes a huge difference. You have to capitalize elements!

Cobalt is a transition metal. It will form a cation, so it has to go first. If this had been written Co3H, then we could have named it, even though the charges aren't balanced.