Quantitative Chem Flashcards
state the law of conservation of mass
no atoms are lost or made during a chemical reaction
The mass of the products= the mass of the reactants
24 g of magnesium reacted with 71 g of chlorine. Calculate the mass of magnesium chloride produced
Mg + Cl2= MgCl2
mass of product=95 grams
sodium + oxygen = sodium oxide
4Na + O2=2Na2O
92 g of sodium reacts with 32 g of oxygen. Work out the mass of sodium oxide produced
124 g
a mass of Calcium carbonate reacted to produce 112 g of calcium oxide and 88 g of carbon dioxide. Calculate the mass of calcium carbonate that reacted.
200 g
MgO + 2HCl = MgCl2 +H2O
A mass of Magnesium Oxide reacts with 73 g of hydrogen chloride to produce 95 g of magnesium chloride and 18 g of water. Calculate the mass of magnesium oxide in the reaction
40g
Products and reactants should be the same
will hydrogen gain or lose an electron
non metal ( will gain electron)
when are ionic compounds formed
when metals react with non metals
what ions do metals form
what ions do non metals form
metal = +ion
most non metals = -ion
what is different about ions formed by transition metals compared to metals in other groups
transition metals form different ions eg Fe3+ Fe 2+ but metals in other groups will all form the same ion eg group 1 forms 1+ ions, group 3 forms 3+ ions
what are the two non metal +ions.
H+
NH4+
how are H and NH4 ions different to other non metal ions
they are positive ions but all other nonmetals form negative ions
what does NH4 stand for in words
ammonium
what is an important rule to remember about the charges of ions in an ionic compound
the charges must cancel out to leave an overall charge of 0
do any ionic compounds have an overall charge
no
work out the chemical formula for the ionic compound:
Sodium Oxide
Na has +1 charge
O has 2- charge
Na2O
oxygen needs 2 electrons
sodium only gives off 1
so 2 Na needed for 1 O
