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Determine the number of moles of sodium hydroxide produced when 2 moles of sodium and 3 mol of water react to form soduim hydroxide and hydrogen gas?
Na +H2O -> NaOH +(1/2)H2 Every mole of Sodium requires one mole of water to make one mole of Sodium Hydroxide. So two moles of Sodium will produce two moles of Sodium Hydroxide. If there are three moles of water in the initial reaction then there will be one mole of water left over after reacting with two moles of Sodium. This reaction will produce half a mole of hydrogen gas.
What volume of hydrogen chloride is produced by the reaction of 40 cm3 of chlorine with hydrogen?
Assuming that hydrogen, chlorine, and hydrogen chloride are all ideal gases and that the temperature and pressure are kept constant, the volume of gas depends only on the number of molecules of gas present. Also, at standard temperature and pressure, hydrogen and chlorine occur as diatomic molecules, and hydrogen chloride also occurs as diatomic molecules. The equation for the reaction is Cl2 + H2 -> 2 HCl. Therefore, the number of molecules of gas is the same before and after the reaction if both gases are present in the initial mixture that has a volume of 40 cm3. In that instance, the volume is the same before and after the reaction. However, the question seems to imply that hydrogen is supplied from an outside source. In that instance, there will be twice as many molecules after the reaction as before, so that the final volume will be 80 cm3.
What are the products of sodium hydroxide decomposition?
http://genchem.chem.wisc.edu/lab/CCA/MVHTM/NACO/NACONAOH.HTM This link is to a video showing the reaction. Following double-replacement conventions, the products formed will be the same as the initial reactants. This video shows that there is no visible reaction, thus these two reactants do not form a product.
How would your results have differed if the tip of the burette was not filled with sodium hydroxide before the initial volume reading was recorded?
You would be lead to assume that there was more NaOH in the pipet than there actually was. Since when for example the pipet reads 10ml this is talking when the space in the burette is also filled up. When it is that the reaction takes place between the NaOH and acetic acid you would think that you used more NaOH than you really did, which will ultimately make you think more acetic acid was in the vinegar than was in fact.
How did volcanoes contribute to the creation of the initial oxygen in the atmosphere?
Volcanoes released gases like water vapor, carbon dioxide, and sulfur dioxide during eruptions. These gases reacted with sunlight and water vapor to form oxygen molecules, contributing to the initial oxygen in the atmosphere.
If 0.1MHAC is titrated with 0.1MNaoh and the dissociation constant ka of acetic acid is 1.8210-5 and the solubility product of water is 110-14 what is the initial pH of the acid?
To find the initial pH of the acetic acid solution, you would need to use the dissociation constant (Ka) of acetic acid. The initial pH of acetic acid can be calculated using the formula pH = 0.5 * (pKa - log[C]), where pKa is the negative logarithm of the dissociation constant and [C] is the initial concentration of the acid. With the given Ka value of 1.82 x 10^-5 for acetic acid, you can determine the initial pH of the solution.
How do you calculate the percent dissociation of a substance in a chemical reaction?
To calculate the percent dissociation of a substance in a chemical reaction, you divide the amount of dissociated substance by the initial amount of the substance and multiply by 100. This gives you the percentage of the substance that has dissociated in the reaction.
Copper sulphate add to sodium hydroxide result colour?
When copper sulfate is added to sodium hydroxide, a blue precipitate of copper hydroxide is formed. The color change observed is from the initial blue color of copper sulfate to the blue precipitate of copper hydroxide.
What is percent dissociation?
Percent dissociation is a measure of the extent to which a substance breaks apart into its constituent ions in a solution. It is calculated by dividing the concentration of the dissociated ions by the initial concentration of the compound and multiplying by 100%. It gives an idea of how much of the compound exists in dissociated form in the solution.
Determine the number of moles of sodium hydroxide produced when 2 moles of sodium and 3 mol of water react to form soduim hydroxide and hydrogen gas?
Na +H2O -> NaOH +(1/2)H2 Every mole of Sodium requires one mole of water to make one mole of Sodium Hydroxide. So two moles of Sodium will produce two moles of Sodium Hydroxide. If there are three moles of water in the initial reaction then there will be one mole of water left over after reacting with two moles of Sodium. This reaction will produce half a mole of hydrogen gas.
What volume of hydrogen chloride is produced by the reaction of 40 cm3 of chlorine with hydrogen?
Assuming that hydrogen, chlorine, and hydrogen chloride are all ideal gases and that the temperature and pressure are kept constant, the volume of gas depends only on the number of molecules of gas present. Also, at standard temperature and pressure, hydrogen and chlorine occur as diatomic molecules, and hydrogen chloride also occurs as diatomic molecules. The equation for the reaction is Cl2 + H2 -> 2 HCl. Therefore, the number of molecules of gas is the same before and after the reaction if both gases are present in the initial mixture that has a volume of 40 cm3. In that instance, the volume is the same before and after the reaction. However, the question seems to imply that hydrogen is supplied from an outside source. In that instance, there will be twice as many molecules after the reaction as before, so that the final volume will be 80 cm3.
When sodium hydroxide dissolve in water estimate the temperature change when the amount sodium hydroxide is doubled?
When sodium hydroxide dissolves in water, it undergoes an exothermic reaction, releasing heat. If the amount of sodium hydroxide is doubled, the same amount of heat will be released, resulting in an increase in temperature. The specific temperature change would depend on the initial amounts and concentrations of the sodium hydroxide and water.
What are the 4 steps in hydrogen combustion?
Hydrogen combustion involves four key steps: Initiation: Hydrogen and oxygen molecules come into contact, often requiring an initial energy source (like a spark) to overcome the activation energy barrier. Propagation: The reaction rapidly proceeds as hydrogen molecules react with oxygen, forming water vapor and releasing energy in the form of heat and light. Termination: The reaction continues until the available hydrogen or oxygen is consumed, or until the temperature drops below the necessary threshold to sustain combustion. Product Formation: The primary products of hydrogen combustion are water (H₂O) and heat, contributing to a clean energy release with minimal pollutants.
Which molecules are subject to further modification after initial synthesis?
the amino acid glycine
Was the Haber process used in the West fertiliser factory?
If hydrogen was stored onsite at the West Fertiliser factory then that is what the explosion was caused by after the initial fire which led to the hydrogen escape.
How can one determine the acid dissociation constant (Ka) from a titration curve?
To determine the acid dissociation constant (Ka) from a titration curve, one can identify the equivalence point on the curve where the amount of acid equals the amount of base added. By analyzing the pH at the equivalence point and using the initial concentration of the acid, the Ka can be calculated using the Henderson-Hasselbalch equation.
How can one determine the concentration of H ions from the given value of the acid dissociation constant (Ka)?
To determine the concentration of H ions from the acid dissociation constant (Ka), you can use the formula H (Ka x acid). This formula helps calculate the concentration of H ions in a solution based on the given Ka value of the acid and the initial concentration of the acid.
