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A 10.0ml sample of the hcl solution was transferred by pipet to an erlenmeyer flask and then diluted by adding about 40ml of distilled water what is the h30 concentration and pH before titration?
Wiki User
∙ 13y ago
The answer depends on the concentration in the original HCl-sol'n.
Let this be Co (mol HCl/Litre). According to dilution 'law': Co.Vo=Cdiluted.Vdiluted
- Cdiluted = Co*10.0 ml / 50 mL = 0.20*Co mmol/ml = Cdiluted
- HCl is a monoprotic strong acid, meaning [HCl]:[H3O+] = 1:1
- H3O+ = concentration HCl solution = Cdiluted = 0.20*Co mmol/ml= 0.20*Comol/L
- pH = -log10[H3O+] = -log10[0.20*Co] = 0.70 - log10[Co]
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoSince the starting concentration of the (original) HCl solution wasn't given, only the C H A N G E in pH can be calculated, as well as some examples.
The dilution factor is (10ml + 40ml) / 10ml = 5.0.
Thus the [H3O+] is 5.0 times lower, so pH will increase.
Taking the negative logarithm (which is what pH is defined as) of this factor, pH will increase by +0.70 units.
Example:
- Original concentration 0.010 mol/L => pH = 2.0
Diluted (5x) concentration 0.0020 mol/L => pH = 2.7
- Original concentration 0.50 mol/L => pH = 0.30
Diluted (5x) concentration 0.10 mol/L => pH = 1.0
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Can a beaker be used in a titration instead of an erlenmeyer flask?
Yes.
What measuring instrument is used in titration?
Titration involves the use of a buret and also an Erlenmeyer flask or beaker (where it is measured).
Why it is preferred to take acid in burette during acid base titration?
The burette can be filled with either acid or base. The acid will go into the burette only if you want to titrate a base , i.e. you don't know the concentration of the base and want to find out. The solution of known concentration goes always into the burette (in order to be able to measure the volume taken to complete the reaction) and so if you wanted to find out the concentration of an acid you would put the base into the burette.
What equipment is used in titration at school?
A burette, a stand, indicator fluid, an Erlenmeyer flask, an acid and a base.
What are the examples of acid base titration?
Determination of the concentration of a base by titration with acids or determination of the concentration of an acid by titration with bases. (http://en.wikipedia.org/wiki/Acid-base_titration)
Can a beaker be used in a titration instead of an erlenmeyer flask?
Yes.
What measuring instrument is used in titration?
Titration involves the use of a buret and also an Erlenmeyer flask or beaker (where it is measured).
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.
Why it is preferred to take acid in burette during acid base titration?
The burette can be filled with either acid or base. The acid will go into the burette only if you want to titrate a base , i.e. you don't know the concentration of the base and want to find out. The solution of known concentration goes always into the burette (in order to be able to measure the volume taken to complete the reaction) and so if you wanted to find out the concentration of an acid you would put the base into the burette.
What equipment is used in titration at school?
A burette, a stand, indicator fluid, an Erlenmeyer flask, an acid and a base.
What instrument is used in measuring?
Titration involves the use of a buret and also an Erlenmeyer flask or beaker (where it is measured).
What instruments used in measuring?
Titration involves the use of a buret and also an Erlenmeyer flask or beaker (where it is measured).
Process in which a solution of known concentration is used to determine the concentration of another solution?
THE PROCESS IS CALLED STANDARDIZATION OR CALIBRATION. It's called titration
What are the examples of acid base titration?
Determination of the concentration of a base by titration with acids or determination of the concentration of an acid by titration with bases. (http://en.wikipedia.org/wiki/Acid-base_titration)
What does titration measure?
Titration is the process used to measure the concentration of a substance in solution.
How is concentration of vinegar tested?
by titration
What are different types of titration?
There are several types of titration techniques, including acid-base titration (determining the concentration of an acid or base), redox titration (determining the concentration of oxidizing or reducing agents), complexometric titration (determining the metal ion concentration using a complexing agent), and precipitation titration (determining the concentration of a dissolved substance by precipitating it).
