Question

..help

Answer 1

First write out what the compounds are. You can look those up.

Answer 2

Google, Bing, Yahoo, etc. Any search engine will do if you don't want to use your notes.

Answer 3

Now identify the ions in them.

Answer 4

Try this https://www.youtube.com/watch?v=V6VdsehOE8w You might want to skip some parts. I have to go. Good luck.

Answer 5

the metals will form anions ie Ag+, K+

Answer 6

and then recombine with the cations in the opposite way

AgNO3 + KC1 => Ag^+ + NO3^- + K^+ + Cl^-
=> AgCl + KNO3,

one of these products will be soluble , the other will be insoluble

Answer 7

to determine which of these is insoluble, check you solubility rules

Answer 8

look pretty good, you might want to say that the equation is stoichiometrically balanced, ie 1 mole of each reactant goes to form 1 mole of each product

Answer 9

well the discussion would mention that the numbers of each atom is the same on each side of the equation, [stoichiometry]

Answer 10

For this one start with a chemical equation, determine the products and then determine the ratios,
next work out how many moles of the product is formed , and how many moles of reactant were used,

Answer 11

Well the reactants are in the first sentence

Answer 12

and one of the product are in the second sentence. You'll have to work out what the other product is from the leftovers

Answer 13

[reactant1] + [reactant2] => [product1] + [product2]

Answer 14

(hmm where did you get that from)

now, what is the molar masses of all those chemicals

Answer 15

find? just work them out
M_(Al2 (SO4 )3) = 2M_(Al)+3(M_(S)+4M_(O)) =

Answer 16

you know how to use a periodic table to determine the molar mass of Al right?

Answer 17

right, so

What is the molar mass of Al2 (SO4 )3)

Answer 18

so you have
the molar mass of Al is 27,

the molar mass of S is 32
&
the molar mass of O is 16


so the molar mass of Al2 (SO4 )3
is simply 2*(27)+3*(32+4*16) =

Answer 19

goood

Answer 20

so work out the molar mass of the other chemicals,
and then (using the masses) you will be able to see how many mole of each are in the reaction

Answer 21

we have just found the molar mass of Al2(SO4 )3 is 342 [g/mol]

now find the molar mass of
Ca(OH)2

Answer 22

yeah , go on

Answer 23

(you can use 40 instead of 40.08 its not going to make a significant difference here)

Answer 24

the calcium hydroxide molecule has one calcium atom and TWO hydroxides

40 + (16+1)*2

Answer 25

yep,

Answer 26

to work out how many mole you have

divide the mass of each chemical by the molar mass

Answer 27

how many moles of those reactants did you find?