writing formulae and equations Flashcards
1
Q
why do scientists use formulae and equations
A
ti summarise the changes that occur in reactions
2
Q
predicting charges on ions -how do you predict the charge on some ions based on their..
A
position in the periodic table
3
Q
predicting charges on ions- metals are groups 1,2,3 what ions do they form
A
1-+
2-2+
3- 3+
4
Q
predicting charges on ions- non metal ions 5,6,7 form … ions
A
5- 3-
6- 2-
7- 1-
5
Q
writing a balanced equation- what does the equation always have to be
A
balanced
6
Q
writing a balanced equation- the large numbers before a formula tell you what
A
how many of that molecule take part/ form in the reaction
7
Q
for the ion nitrate what is the formula
A
NO 3-
8
Q
carbonate formula
A
CO3 2-
9
Q
sulphate formula
A
SO4 2-
10
Q
hydroxide formula
A
OH-
11
Q
ammonium formula
A
NH4 +
12
Q
zinc formula
A
Zn2+
13
Q
silver formula
A
Ag+
