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What was done in the experiment to ensurethat all KHCO3 was react?
In the experiment, excess HCl was added to ensure that all KHCO3 was reacted. Excess reactants ensure that all of the limiting reactant is completely consumed in the reaction, leaving none unreacted. When all KHCO3 reacts, the reaction reaches completion.
Why does the luminol light reaction stop after a period of time?
The luminol reaction is an example of "chemiluminescence". This is when a chemical reaction yields a product in an electronically excited state (at least one electron in the product is at a level above the ground state). The excited product loses energy in the form of a photon of light when the electron drops to the ground state level. In the case of luminol the reaction is an oxidation under alkaline conditions and the reaction stops when either all the luminol, all the oxidising agent or all the alkali has been converted
What is the Function of barium in titration?
Barium is commonly used as an indicator in titrations to detect the endpoint of a reaction. It forms a white precipitate when combined with sulfate ions, which signals that all the sulfate ions in the solution have reacted, allowing the endpoint to be determined.
Why only a small amount of enzyme is needed to catalyse a reaction involving many molecoles?
The principle reason a little bit of enzyme can catalyze a reaction involving many molecules is that enzymes are not consumed by the reactions they catalyze. Enzymes are typically multi-use entities and will continue acting until all substrates are reacted.
Is methane balanced or unbalanced?
Methane is a molecule with the formula of CH4 .!!! It is only unbalanced if it is involved in a chemical reaction (combustion). e.g. CH4 + O2 = 2H2O + C Here it is unbalanced(too much CH4) because CO2( Carbon Dioxide ) is the other product, which is NOT produced in this reaction. The equation CH4 + 2O2 = 2H2O + CO2 Methane is now balanced, just the correct quantity for the reaction to complete. NB For all compounds, they are neither balanced nor unbalanced. It is the quantities that are reacted that make the reaction (un)/balanced.
What is complete reaction?
COMPLETE reaction - ALL of the reactants are reacted into different products. INCOMPLETE reaction - NOT ALL of the reactants are reacted into different products. ie. some of the original substance remains.
What is the limiting factor in the reaction of hydrochloric acid and magnesium?
The limiting factor in the reaction between hydrochloric acid and magnesium is the amount of magnesium present. Once all the magnesium has reacted with the hydrochloric acid, the reaction cannot proceed further.
How much oxygen reacted with the piece of copper?
The amount of oxygen reacting with copper can be determined by the reaction stoichiometry. For example, in the reaction of copper with oxygen to form copper oxide, two moles of oxygen react with one mole of copper. From the given amount of copper and assuming all the copper reacted to form copper oxide, you can calculate the corresponding amount of oxygen that reacted with the copper.
What is the theoretical percent yield?
Percent yield is a term that compares the amount actually produced in a chemical reaction versus how much could have been produced had all the reactants reacted fully. Theoretical percent yield is always 100%, because theoretically, all of the reactants reacted.
What was done in the experiment to ensurethat all KHCO3 was react?
In the experiment, excess HCl was added to ensure that all KHCO3 was reacted. Excess reactants ensure that all of the limiting reactant is completely consumed in the reaction, leaving none unreacted. When all KHCO3 reacts, the reaction reaches completion.
How can you tell when the copper has reacted completely and the excess sulfur is burned off?
You can tell when the copper has reacted completely and the excess sulfur is burned off by observing a consistent color change in the reaction mixture. Once the color stops changing, it indicates that the reaction is complete and all the excess sulfur has been consumed.
If in a circuit why do batteries die?
Batteries produce electricity by chemical reaction. When all the chemicals in the battery are used up, the reaction can't continue and the battery dies.
Initially the Powhatan Indians reacted to the Virginia colonists by?
The Powhatan Native Americans reacted to the Virginia colonists by attempting to kill them all.
Why does a pi continue infinitely?
Because like all other irrational numbers it cannot be expressed as a fraction
Why don't glow sticks last forever?
Glow sticks contain chemicals that undergo a chemical reaction to produce light. This reaction has a limited lifespan, and once all the chemical components have reacted, the glow stick will no longer produce light. This is why glow sticks do not last forever.
Why does the reaction stop between magnesium and hydrochloric acid?
The reaction between magnesium and hydrochloric acid stops when all the magnesium has reacted with the acid to form magnesium chloride and hydrogen gas. Once all the magnesium has been consumed in the reaction, there is no more magnesium to react with the acid, leading to the reaction coming to a halt.
Why does the luminol light reaction stop after a period of time?
The luminol reaction is an example of "chemiluminescence". This is when a chemical reaction yields a product in an electronically excited state (at least one electron in the product is at a level above the ground state). The excited product loses energy in the form of a photon of light when the electron drops to the ground state level. In the case of luminol the reaction is an oxidation under alkaline conditions and the reaction stops when either all the luminol, all the oxidising agent or all the alkali has been converted
