Hypothesis
“Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to an electric current being passed through the water.” As we know, water is a model of molecular compound, in which atoms are bounded with each other by sharing electrons. This type of bond is known as covalent bond. In order to divide the water solution into two constituents, Hydrogen H and oxygen O2, we use the method of water electrolysis. I predicted that we are going to separate water solution into hydrogen and oxygen substances by passing an electric current along them. The electric current charged negatively is called cathode, while electric current charged positively is called anode. Further, the positive charged ions (cations) are likely to step toward cathode, whilst negatively charged ions (anions) are likely to move toward anode. The reaction that happen during the electrolysis of water is described as below:
2H2O (aq) → 2H2 (g) + O2 (g)
Materials
- Plastic cup
- Wire
- 9 volt battery
- 2 test tubes
- Electrolyte
- NaHCO3
Method
- Place first 30 to 50ml NaCl into a plastic cup to act as electrolyte
- Label one tube positive(+) and negative(-) and attach 2 wires to the 9 volt battery
- Insert a wire into each tube of the test tubes with NaHCO3 and label each tube (no air in the tube)
- Observe what happens to the exposed part of the wire in each tube.
Results
Fig.1. The electrolysis of water occurring in plastic cup
The solution of sodium chloride (NaCl), will assist the conductress of electric current in electrolysis. Sodium chloride facilitates the flow of electric current along the solution and terminals of battery. Since, sodium chloride is a salt in contact with water it ruptures in Na+ and Cl- ions which are...
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...rts the electricity along electrodes. Since, the silver nitrate is an oxidizer that loses electrons and allows the current to flow, however the reduction that occurs in cathode gains electrons and galvanize over the coin. The process that continues during electroplating of copper is described as below:
(Anode) Cu2+ (aq) + 2e- = Cu(s)
(Cathode) Cu(s) = Cu2+(aq) + 2e-
The chemical reaction of silver nitrate and copper during electroplating process:
2 AgNO3 + Cu → Cu (NO3)2 + 2 Ag
Silver nitrate (aq) also decays (g) when is excited:
2 AgNO3 → 2 Ag + O2 + 2 NO2
There might be some sources of error in the contamination of silver nitrate and in the amount poured in the plastic cup. Also, another source of error might be the layer of coin made of copper, which sometimes are covered with different dirties and in addition doesn’t allow the electroplating process to occur.
We used the pipette filler and filled the glucose rinsed pipette to add 10ml of 10% of glucose in test tube 0.
When a solution conducts electricity, the charge is carried by ions moving through a solution. Ions are atoms or small groups of atoms that have an electrical charge. Some ions have a negative charge and some have a positive charge. Pure water contains very few ions, so it does not conduct electricity very well. Not all substances are made up of ions. Some are made of uncharged particles called molecules. Sugar is such a substance. When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution. That's why in Hands-on Squishy Circuits, the sugar PLAY-DOH did not produce electricity. The salt had ions in it to produce the electricity needed to make the LEDs light up.
I will get 5 test tubes and place them into the test tube rack. I will
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
5. Put the stirring wire through the second hole of the stopper. Insert the stopper, thermometer, and wire into the test tube. Make sure that the thermometer bulb is below the surface of the solution.
An electrode is a component of an electric circuit that connects the conventional wiring of the circuit to a conducting medium such as an electrolyte or a gas. The electrically positive electrode is called the anode and the negative electrode the cathode. If an anode and a cathode are placed in a solution of an electrolyte and a source of direct current is connected between them, the positive ions in the
After five the test tube was removed and cooled to room temperature. Three more test tubes were obtained and labeled 1, 2, and 3. The correct reagent was added to each test tube as seen. The spectrophotometer was adjusted
Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. An electrode is a component of an electric circuit that connects the wiring of the circuit to a gas or electrolyte. A compound that conducts in a solution is called an electrolyte. The electrically positive electrode is called the anode and the negative electrode the cathode.
Put a label on each test tube. With a pencil, number each test tube from one to twelve.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
The Results obtained from the experiment proved the original theory at the start of the experiment. The results table clearly shows pigment levels increasing with the rinsing temperature increments.
2. In the large beaker, put water and boil it completely. After that, remove the beaker from heat. 3. Sample tubes (A-D) should be labeled and capped tightly.
At the cathode the hydrogen ions gain an electron. They are discharged and are converted into hydrogen gas: 2H (+) + 2e (-) → H2 At the anode, the hydroxide, not the sulphate ions are discharged. Water and oxygen gas are formed: 4OH (-) → 2 H2O + O2 + 4e (-) The hydrogen gas can be collected and measured. The greater the volume of hydrogen gas formed over a set period of time, the faster electrolysis is occurring.
Time - The longer time can let more copper ions from the anode to the cathode if the current are the same. There are still more factors which can affect the mass deposited during electroplating. 3). Distance between two electrodes - If the distance between the two electrodes is greater, the copper ions require to travel more from the anode to the cathode.
tube. Add 6 mL of 0.1M HCl to the first test tube, then 0.1M KMnO4 and