E is a solution of trioxonitrate {v}acid
F contain 2.00g of sodiun hydroxide pellets in
500cm^3 of solution
{1a}
put E into the burette titrate with 20.0cm^3
portion of E using
methyl orange as indicator.
{i}
record the volume of your pipette
{ii}
tabulate your burette reading and calculate
average volume of E used.
{iii}
write the equation for the reaction
{1b}
from your result and the information provided
calculate the
{i}
concentration of F in moldm^3
{ii}
concentration of E moldm^3
{iii}
mass of sodium trioxonitrate {v}formed when
500dm^3 of F is
conmpletely neutralised by E.
Equation for reaction is HNO3+NaOH_NaNO3
+H2O.
{Na =23.0;H=1.00;N =14.0;o=16.0}.
=============================
(2)
G is a sample of a carbonhydrate.His a sample of
metallic oxide.
Carry out the following exercises on G and
H.record your observation
and identify any gas{es}evolved.state the
conclusions you draw from
the result of each test.
{2a}
{i}
put all of G in a test tube and add about 5cm^3
distilled water.
Stir well and test with litmus.divide the solution
into two portions
{ii}
To the portion form{a}{i}.add one or two drops of
iodine soltion.
{iii}
to the second portion from{a}{i}.add a few drops
fehlings solution and warm.
{2b}
{i}
put half of H in a boilimg tube and add about
5cm^3 of dilute
tetraoxosulphate {vi}acid and heat to dissolve all
of H,
{ii}
to about 2cm^3 of the resulting solution in {b}{i}
.add aqueous ammonia
in drops and then in excess.
{iii}
To the resulting mixture in {b}{ii},add dilute
hydrogen chloride acid
solution in drops and then in excess.
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