write the objective of the experiment in one paragraph In a second paragraph write and explain the analvsis

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With the image attached write the objective of the experiment in one paragraph In a second paragraph write and explain the analvsis Please please answer super super super fast it's super important
PURPOSE
IDENTIFICATION OF AN UNKNOWN AMMONIUM SALT
In this lab you will:
1. gain experience in the use of the concept of equivalent mass in acid - base calculations,
2. determine the equivalent mass and thus the identity of an unknown crystalline solid
which has the general formula (NH4)2X, and
METHOD
For an acid, the equivalent mass is defined as the mass in grams that provides one mole of
protons in a neutralization reaction. Ammonium salts react with strong bases, such as
sodium hydroxide, as shown below.
EXPERIMENT 2
heat
NH4+ (aq) + OH- (aq)
NH3 (aq) + H₂O(1)
(1)
In this experiment we will add a large excess of NaOH to react with the ammonium salt. The
ammonia formed will be driven out of solution by heating.
NH3(aq)
NH3(g)
(2)
Note that the addition of heat drives equilibrium (2) to the right. This removes ammonia
from the solution and gradually drives equilibrium (1) to completion.
unknown ammonium salt
0.2 M standard NaOH
0.2 M standard HCl
bromthymol blue indicator
SAFETY
The remaining unreacted excess NaOH will be backtitrated with standard acid. The amount
of NaOH which reacted with the NH4+ can be calculated by subtracting the amount of NaOH
left from the amount of NaOH originally added.
CHEMICALS
EQUIPMENT
125 mL Erlenmeyer flasks
1-50 mL buret, clamp, ring stand
1-50mL volumetric pipet
Red litmus paper
Boiling chips/stones
The dilute acid and base used here are relatively safe. Clean up any spills. Wear your goggles
during the heating to remove ammonia. Do the heating in the hood to avoid ammonia fumes
in the room.
Transcribed Image Text:PURPOSE IDENTIFICATION OF AN UNKNOWN AMMONIUM SALT In this lab you will: 1. gain experience in the use of the concept of equivalent mass in acid - base calculations, 2. determine the equivalent mass and thus the identity of an unknown crystalline solid which has the general formula (NH4)2X, and METHOD For an acid, the equivalent mass is defined as the mass in grams that provides one mole of protons in a neutralization reaction. Ammonium salts react with strong bases, such as sodium hydroxide, as shown below. EXPERIMENT 2 heat NH4+ (aq) + OH- (aq) NH3 (aq) + H₂O(1) (1) In this experiment we will add a large excess of NaOH to react with the ammonium salt. The ammonia formed will be driven out of solution by heating. NH3(aq) NH3(g) (2) Note that the addition of heat drives equilibrium (2) to the right. This removes ammonia from the solution and gradually drives equilibrium (1) to completion. unknown ammonium salt 0.2 M standard NaOH 0.2 M standard HCl bromthymol blue indicator SAFETY The remaining unreacted excess NaOH will be backtitrated with standard acid. The amount of NaOH which reacted with the NH4+ can be calculated by subtracting the amount of NaOH left from the amount of NaOH originally added. CHEMICALS EQUIPMENT 125 mL Erlenmeyer flasks 1-50 mL buret, clamp, ring stand 1-50mL volumetric pipet Red litmus paper Boiling chips/stones The dilute acid and base used here are relatively safe. Clean up any spills. Wear your goggles during the heating to remove ammonia. Do the heating in the hood to avoid ammonia fumes in the room.
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