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The balanced equation for the electrolysis of water is 2H2O -> 2H2 + O2. From 36.0g of water, the molar mass is 18.02 g/mol. This means there are 2 moles of hydrogen gas produced. The theoretical yield of hydrogen gas is 2 moles. The percent yield is calculated by dividing the actual yield (3.80g) by the theoretical yield (2 moles) and multiplying by 100%.
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Why must bauxite be purified before it undergoes electrolysis?
Bauxite must be purified before electrolysis to remove impurities such as silica, iron oxide, and other components that can interfere with the electrolysis process. Purifying bauxite helps ensure that the electrolysis reaction proceeds efficiently, producing high-quality aluminum metal.
What observations will you look for to determine if a metal undergoes a reaction?
To determine if a metal undergoes a reaction, you can look for changes in appearance, such as color or texture, the release of gas or heat, and the formation of a new substance.
What is produced when Sodium Chloride undergoes electrolysis?
When sodium chloride undergoes electrolysis, it decomposes into sodium metal and chlorine gas. Sodium ions are attracted to the negative electrode (cathode) where they gain electrons to form sodium metal. Chloride ions are attracted to the positive electrode (anode) where they lose electrons to form chlorine gas.
How will you convert acetic acid to ethane?
Acetic acid can be converted to ethane through decarboxylation, where acetic acid undergoes thermal decomposition to produce carbon dioxide and ethane. This process typically requires high temperatures and pressure.
What happens to ethanol at C?
At 78.37°C, ethanol boils and undergoes a phase change from liquid to gas. It turns into ethanol vapor, which can be collected and condensed back into liquid ethanol through condensation.
Why does electrolysis involves redox reactions?
Electrolysis involves redox reactions because it requires the transfer of electrons between the electrodes and the electrolyte solution. The anode undergoes oxidation (loses electrons) while the cathode undergoes reduction (gains electrons), which is the basis of redox reactions. This electron transfer allows for the decomposition of the electrolyte into its constituent elements.
Why must bauxite be purified before it undergoes electrolysis?
Bauxite must be purified before electrolysis to remove impurities such as silica, iron oxide, and other components that can interfere with the electrolysis process. Purifying bauxite helps ensure that the electrolysis reaction proceeds efficiently, producing high-quality aluminum metal.
What observations will you look for to determine if a metal undergoes a reaction?
To determine if a metal undergoes a reaction, you can look for changes in appearance, such as color or texture, the release of gas or heat, and the formation of a new substance.
Why is cryolite added to bauite before it undergoes electrolysis?
Cryolite is added to bauxite before electrolysis to lower the melting point of the mixture, allowing for easier extraction of aluminum from the ore. It also helps to increase the conductivity of the electrolyte solution, making the process more efficient.
How does gold change from the time it is collected to the time it is ready to sell?
Gold undergoes several processes from collection to sale. Initially, raw gold is extracted from mines and then refined to remove impurities, often through techniques like smelting or electrolysis. After refining, the gold is alloyed, shaped into bars or coins, and hallmarked for purity. Finally, it is packaged and presented for sale, either through retailers or in the wholesale market.
Why is the volume of gas collected twice of the volume of other gas when electric current is passed through water?
When an electric current is passed through water, water is split into it's two component gasses- hydrogen and oxygen. You will get about twice as much hydrogen as oxygen- since water (H2O) has twice the hydrogen as oxygen.
How is the electrolysis different when the sodium chloride is dissolved in water?
If you are asking for the difference between the electrolysis of concentrated NaCl and aqueous NaCl, the water molecules in aqueous NaCl undergoes the Redox reactions rather than the sodium and chloride ions because the electric potential is higher. In concentrated NaCl, the chlorine atoms are oxidised instead.
What is produced when Sodium Chloride undergoes electrolysis?
When sodium chloride undergoes electrolysis, it decomposes into sodium metal and chlorine gas. Sodium ions are attracted to the negative electrode (cathode) where they gain electrons to form sodium metal. Chloride ions are attracted to the positive electrode (anode) where they lose electrons to form chlorine gas.
What are the products of H2O?
The products of the chemical reaction involving water (H2O) can vary depending on the conditions. In general, when water undergoes electrolysis, it can produce hydrogen gas (H2) at the cathode and oxygen gas (O2) at the anode.
How will you convert acetic acid to ethane?
Acetic acid can be converted to ethane through decarboxylation, where acetic acid undergoes thermal decomposition to produce carbon dioxide and ethane. This process typically requires high temperatures and pressure.
What happens to ethanol at C?
At 78.37°C, ethanol boils and undergoes a phase change from liquid to gas. It turns into ethanol vapor, which can be collected and condensed back into liquid ethanol through condensation.
What changes in matter occurs in electrolysis?
During electrolysis, matter undergoes both chemical and physical changes. An electric current is passed through an electrolyte, causing the decomposition of compounds into their constituent elements. At the electrodes, oxidation and reduction reactions occur: cations gain electrons at the cathode (reduction), while anions lose electrons at the anode (oxidation). This process results in the formation of different substances at the electrodes, effectively separating and transforming the original material.
