Kimberly R.
Salarza BSN 1-F
Experiment 1
Water
Procedure:
EFFLORESCENCE AD DELIQUESCENCE
On a watch glass place a pinch of Na2Co310H2O on one side and pinch of anhydrous CaCl2 on the
opposite side. Set aside for 2 hours. Note the changes.
Before After
Observation:
After two hours of observing the experiments, CaCl2 completely dissolved from its solid form to
liquid.While the Na2CO3. 10H2O did not change at all.
USES OF WATER
•In a dry test tube, mis 0.5 grams of Pb (NO3)2 and K2CrO4
-After placing 0-5grams of Pb (NO3)2 and K2CrO4 In a try test tube then lead nitrate from solid turned
into liquid when It was reacts to potassium chromate. the color was also changed into red orange.
•Add 5ml of water to the mixture and shake, is there reaction?
-after added 5ml of water to the Pb(NO3)2 and K2CrO4 in a test tube, after mixture stirred they are
dissolved in water but still there's amount of solid/mixture sinked.
• What is the role of water in this experiment ?
-the role of water in this experiment is to dissolve the substance, the role of water after mixing /
stirring the Potassium Chromate (K2CrO4) reacts to lead nitrate Pb(NO3)2 to produce Yellow
Precipitate of lead Chromate and a solution of potassium nitrate this called also replacement reaction.
•1 ml Conc. HNO3 In a test tube. Drop a piece of copper turning into the test tube. In another test tube,
place 2 ml of water. Add 5 drops of Con HNO3 and a drop a piece of copper turning. what is the role of
water in the second test tube?
-the role of water in the Sec. Test tube, before anything else the Copper turning became green Colour
after it was ligated by nitrate ion in high concentration acid, as added water the role of water is to
displaces the nitrate ions producing the Characteristic blue colour in the fountain.
DETECTION OF WATER IN A HYDRATE
Place 0.5 grams of copper (II) sulfate in a clean, dry test tube. Heat slowly and note the change in color.
Add 5 drops of water. Observe the changes that takes place.
Before After
Observation:
The chemical CuSO4 (Copper Sulfate) was poured into the test tube and heated using the Alcohol
lamp. Several minutes into the procedure, the solid chemical, CuSO4, changed colors. It went from
blue and changed color into ash/ gray-ish blue. After the heating process, it’s time to add water.
Adding the water made the chemical (CuSO4) liquid from solid, and see how the chemical came back
to its original color.
HYDROLYSIS
In a beaker, boil 25 ml of water, and add 5ml feCl3 solution. Continue boiling and compare the color of
the solution before and after heating.
Before After
Observation:
We followed the necessary procedures as provided in the experiment. We prepared 25mL of boiling
water and added 5mL of FeCl solution while the water continues to vaporize. Upon observation of the
experiment, not only the color changes but also the amount of water after the FeCl solution is added.
It increases up to 30mL while continuously boiling and decreases to 20mL after cooling down leaving
a caramel like color.
SURFACE TENSION
Fill a beaker with 100ml of water. Sprinkle a teaspoon of flour unto the surface. Add one drop of liquid
detergent. Observe.
Observation:
-For this part of the experiment, we filled a beaker with 100 mL of water, sprinkled flour on the surface,
and added a drop of liquid detergent. After dropping the liquid detergent, we observed that the flour
enclosed the liquid detergent, such as a membrane, and sank slowly to the bottom of the beaker. In
conclusion, the flour has a non-polar component that separates the liquid detergent from the water
by enveloping it like a membrane.
DIFFUSION
Fill a beaker with water. Drop some ink unto the surface of water. Observe.
Stirr the water with a spoon. Observe.
Observation:
-When we drop the ink in the water, the ink slowly move from areas of higher concentration to those
of lower concentration. The color of the ink spreads evenly throughout the water within seconds after
we stir.
QUESTIONS:
1. Water has a relatively high heat of vaporization. How does this property of water help regulate body
temperature?
-The high heat of vaporization means that water cannot easily be vaporized. The water must reach a
relatively high temperature for it to evaporate or turn gas. Since water has this property, it can help
regulate the body temperature by keeping the body hydrated despite hot environments.
2. How do high values of heat of fusion and high heat of vaporization make water a medium for
sustaining life?
-The process when a solid substance is heated and turned into liquid is the Heat of Fusion, while
Vaporization is when a liquid substance is heated and turned into gas. Water has these properties but
must have a higher value or temperature for such properties to occur. These properties of water can
also make water a medium for sustaining life by still being in a liquid state despite hot weather and
turning ice into liquid or water to provide for our survival needs, such as thirst and hydration.
3. What are the properties of water?
-The properties of water include cohesion, surface tension, boiling point, viscosity, density, capillary
action, high heat capacity, and high polarity.
