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How do you prepare 3 percent of hydrogen peroxide from 30 percent of hydrogen peroxide?
To prepare 3% hydrogen peroxide from 30% hydrogen peroxide, you need to dilute the 30% solution with water. The formula to calculate the dilution is C1V1 = C2V2, where C1 is the initial concentration (30%), V1 is the volume of the initial solution, C2 is the final concentration (3%), and V2 is the final volume of the solution you want to prepare. By plugging in the values, you can determine the volume of 30% hydrogen peroxide needed and the volume of water needed to achieve a 3% solution.
What is bromine and carbon tetrachloride?
Bromine in carbon tetrachloride is a brown-colored solution and used as a chemical test. When drops of bromine/carbon tetrachloride are added to a solution containing an unknown compound and the brown-colored bromine solution disappears, that means that the unknown compound contains carbon-carbon double bonds (since it absorbed the bromine solution). On the other hand, if the brown-colored bromine solution doesn't disappear then it means that no carbon double bonds are present. This is called a "Bromine Test."
An 8.192-mL sample of an unknown has a mass of 9.02gWhat is the density of the unknown?
Density is equal to mass divided by volume. In this case, the mass is 9.02g and the volume is 8.192mL. Calculate the density by dividing the mass by the volume: 9.02g / 8.192mL = 1.10 g/mL. So, the density of the unknown substance is 1.10 g/mL.
What volume of 2.050 M Copper II Nitrate required to prepare 750.0 ml of 8543 M solution?
Use the formula C1V1 = C2 V2 where, C1 is the concentration of the original = 2.050 mol/L, V1 is the volume you are trying to look for = x, C2 is the new concentration you want 0.8543 mol/L and V2 si the new volume you want 0.750 L So substituting into the formula you would get 2.050 x V1 = 0.8543 x 0.750 2.0502 v1 = 0.640725 V1 = 0.640625 / 2.050 V1 = 0.3125 L
15.00mL of 1.600M NaOH solution exactly neutralizes 20.00mL of an unknown monoprotic acid solution. Calculate the molarity of the acid solution. I got .686M... is this correct?
No, it's not correct. Liters*molarity = moles (0.015L)*(1.600moles/L) = 0.024 moles of NaOH One mole of NaOH would neutralize one mole of the MONOprotic acid, so: (0.024 moles of acid)/(0.020L) = 1.2M
What is a standard solution and how is it used in titration?
A standard solution is a solution with a known concentration of a substance. In titration, a standard solution is used to determine the concentration of another substance by reacting the two solutions until a chemical reaction reaches completion. The volume of the standard solution needed to react completely with the unknown solution is used to calculate the concentration of the unknown substance.
What is the purpose of adding an indicator to an unknown solution?
Indicators contain chemicals that will react with certain substances. If that substance is present in your unknown solution, a reaction will occur. If no reaction occurs, then that substance is not present in your solution
What is the purpose of dissolving unknown Fe in the acid?
The purpose is to prepare a sample solution for analysis.
An unknown substance is added to a solution and the pH increases The substance is best described as what?
The substance is likely a base, as bases typically lead to an increase in pH when added to a solution. Bases are substances that can accept protons or release hydroxide ions, causing the solution to become more basic.
What is titrate?
Titrate is a process used in chemistry to determine the concentration of a substance in a solution. It involves slowly adding a solution of known concentration (titrant) to another solution until a reaction is complete, allowing the concentration of the unknown substance to be calculated.
An unknown substance placed into a solution caused a chemical reaction to take place faster and at a lower temperature than usual The substance was probably?
a catalyst
What is The process of adding a known amount of solution of known concentration to determine the concentration of another solution is called?
titration is the best method to determine the unknown concentration of the unknown. if ur known is a solid then you would have to used distilled water to ensure it is submerged before you titrate.
How do you test for monosaccarides?
You place Benedict's solution (blue solution) and the unknown substance (possibly containing monosaccarides) into a beaker and then heat it for approximately 5 minutes. If the substance contains monosaccarides, the solution will turn from blue to orange.
What unknown quantity can be calculated after performing a titration?
Titrations can be used to work out the initial amount of moles of a substance (for instance the number of moles of iron in a tablet).
How to use stoichiometry determine the concentration of a substance?
To use stoichiometry to determine the concentration of a substance, you need to first balance the chemical equation for the reaction involving the substance. Next, determine the moles of the known substance and use the balanced equation to relate it to the moles of the unknown substance. Finally, calculate the concentration of the unknown substance in terms of moles per liter based on the volume of the solution.
Is sodium hydroxide unknown solution?
Sodium hydroxide is not an unknown solution.
What is the purpose of titration?
The process of Titration is used to determine the unknown concentration of a known reactant, such as acid. It is used industially to find the strength of acid so it can be used for other things.
