Part 1 Preparation of a Standard Solution (Sodium
Carbonate)
Calibration of the balance
Known Mass (g) 200.00
Mass on balance (g) 200.17
Difference (g) O.17
Percentage error of Balance = 0.005%
error of balance=(difference in mass/ known mass) x100
(0.07/200) x100=0.085
Percentage error of measurement = 0.17%
Risk Assessment
Science Location Risk assessor Assessment date
name
Risk No Description of Hazard Who will be Risk Rating Control Residue Risk
activity effected (H M L) Measures Rating (H M L)
Mixing wrong Physical me m Ask to work in l
chemicals due to hazard a quit lab with
noise control less people
around, if the
noise gets to
load stop till
the noise has
gone o a
working level
you are good
to work at
3 Liquid drops Electrical People around m Close circuit if l
onto Electrical hazard me not using,
circuit keep liquids at
a safe
distance, if
spillages do
happen or
liquids touch
, an electrical
circuit close
the
connection to
power
immediately
and call
teacher
4 trips and falls Physical me and the m make sure all L
hazard people around equipment is
u and the in the middle
teacher as of the desk,
they he to bags and stool
clean it up tucked under
the bench
making it hard
for you to trip
5 Acid on skin, Chemical Me and the m Using lab m
harmful acids hazard people around coats glasses
include me and lab coat.
hydrochloric being more
acid and sodium careful when
hydroxide, can dealing with
cause irritant on acids and
the skin glass wear.
Wash of if
come in
contact with
skin
Mass of Sodium Carbonate
Mass of weighing boat (g) 1.06
Carbonate)
Calibration of the balance
Known Mass (g) 200.00
Mass on balance (g) 200.17
Difference (g) O.17
Percentage error of Balance = 0.005%
error of balance=(difference in mass/ known mass) x100
(0.07/200) x100=0.085
Percentage error of measurement = 0.17%
Risk Assessment
Science Location Risk assessor Assessment date
name
Risk No Description of Hazard Who will be Risk Rating Control Residue Risk
activity effected (H M L) Measures Rating (H M L)
Mixing wrong Physical me m Ask to work in l
chemicals due to hazard a quit lab with
noise control less people
around, if the
noise gets to
load stop till
the noise has
gone o a
working level
you are good
to work at
3 Liquid drops Electrical People around m Close circuit if l
onto Electrical hazard me not using,
circuit keep liquids at
a safe
distance, if
spillages do
happen or
liquids touch
, an electrical
circuit close
the
connection to
power
immediately
and call
teacher
4 trips and falls Physical me and the m make sure all L
hazard people around equipment is
u and the in the middle
teacher as of the desk,
they he to bags and stool
clean it up tucked under
the bench
making it hard
for you to trip
5 Acid on skin, Chemical Me and the m Using lab m
harmful acids hazard people around coats glasses
include me and lab coat.
hydrochloric being more
acid and sodium careful when
hydroxide, can dealing with
cause irritant on acids and
the skin glass wear.
Wash of if
come in
contact with
skin
Mass of Sodium Carbonate
Mass of weighing boat (g) 1.06
