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Concentrated HCl is used in flame tests to clean the metal wire loop before dipping it into the sample and to remove any impurities that may interfere with the observation of the flame color produced by the metal ions. Additionally, HCl helps to prevent contamination between different samples being tested on the same wire loop.
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Why in flame tests concentrated hydrochloric acid is used to make the paste of the salt?
Concentrated hydrochloric acid is used to make a paste of the salt in flame tests because it helps to clean the metal surface by removing impurities and oxides that may interfere with the test. This ensures that the color produced in the flame is mainly due to the metal ions present in the salt, providing a clearer and more accurate result.
Why HCl is used in flame test?
Hydrochloric acid (HCl) is used in flame tests to clean the surface of the metal ion being tested, removing any impurities that could interfere with the observation of the characteristic flame color produced by the metal ion. HCl also helps in breaking down any complexes that may be present, resulting in a clearer and more distinct flame color.
How do you prepare 0.2 mol per liter HCl from concentrated HCL?
To prepare 0.2 mol/L HCl from concentrated HCl (e.g., 37% HCl), you would need to dilute the concentrated HCl with water in the appropriate ratio. Since the concentrated HCl usually has a density of around 1.19 g/mL, you can use the formula M1V1 = M2V2 to calculate the volume of concentrated HCl needed. After calculating the volume of concentrated HCl required, add water to make up the final volume of 1 liter to achieve a 0.2 mol/L HCl solution.
How do you make 4N HCl from concentrated HCl?
To make 4N HCl from concentrated HCl, you can dilute the concentrated HCl with water in a ratio that will give you a final concentration of 4N. For example, to make 1L of 4N HCl, you would mix 273 ml of concentrated HCl (37% w/w) with 727 ml of water. Always remember to add acid to water, not the other way around, and wear appropriate safety gear when working with concentrated acids.
How do you prepare hcl 0.02n?
To prepare 0.02N HCl solution, you would need to dilute a more concentrated HCl solution with water. Calculate the volume of concentrated HCl needed using the formula C1V1 = C2V2, where C1 is the concentration of the concentrated HCl, V1 is the volume needed, and C2 is the desired concentration (0.02N). Dilute the calculated volume of concentrated HCl with water to reach the desired final volume.
Why in flame tests concentrated hydrochloric acid is used to make the paste of the salt?
Concentrated hydrochloric acid is used to make a paste of the salt in flame tests because it helps to clean the metal surface by removing impurities and oxides that may interfere with the test. This ensures that the color produced in the flame is mainly due to the metal ions present in the salt, providing a clearer and more accurate result.
What is coned Hcl?
Coned HCl is likely a typo for concentrated hydrochloric acid (HCl). Concentrated HCl is a strong acid commonly used in laboratories and industry for various chemical reactions and applications. It is corrosive and should be handled with care due to its ability to cause burns on contact with skin or tissue.
Why HCl is used in flame test?
Hydrochloric acid (HCl) is used in flame tests to clean the surface of the metal ion being tested, removing any impurities that could interfere with the observation of the characteristic flame color produced by the metal ion. HCl also helps in breaking down any complexes that may be present, resulting in a clearer and more distinct flame color.
How do you prepare 0.2 mol per liter HCl from concentrated HCL?
To prepare 0.2 mol/L HCl from concentrated HCl (e.g., 37% HCl), you would need to dilute the concentrated HCl with water in the appropriate ratio. Since the concentrated HCl usually has a density of around 1.19 g/mL, you can use the formula M1V1 = M2V2 to calculate the volume of concentrated HCl needed. After calculating the volume of concentrated HCl required, add water to make up the final volume of 1 liter to achieve a 0.2 mol/L HCl solution.
How do you make 4N HCl from concentrated HCl?
To make 4N HCl from concentrated HCl, you can dilute the concentrated HCl with water in a ratio that will give you a final concentration of 4N. For example, to make 1L of 4N HCl, you would mix 273 ml of concentrated HCl (37% w/w) with 727 ml of water. Always remember to add acid to water, not the other way around, and wear appropriate safety gear when working with concentrated acids.
What is the molariy of concentrated HCl?
Concentrated HCl is typically 36.5% industrially. It is thus almost exactly 10 Molar.
What is the formula for concentrated hydrochloric acid?
The formula of dilute hydrochloric acid is HCl
How do you prepare hcl 0.02n?
To prepare 0.02N HCl solution, you would need to dilute a more concentrated HCl solution with water. Calculate the volume of concentrated HCl needed using the formula C1V1 = C2V2, where C1 is the concentration of the concentrated HCl, V1 is the volume needed, and C2 is the desired concentration (0.02N). Dilute the calculated volume of concentrated HCl with water to reach the desired final volume.
Why copper sulphate not used in flame test?
A.o.A it is the demand of flame test that salt should be easily vapourised as metalic chloride for this purpose we wet the given salt with acid (HCl) so that it change into chloride but copper cannot remove hydrogen(As Au,Ag,Pt) from acid so cannot changed into chloride and not used in flame test. but if there is chloride salt of copper it can be easily used for flame test with-out use of acid.....
How do you prepare 2 mol dm of hcl for titration?
To prepare 2 mol dm-3 HCl solution for titration, you will need to dilute a concentrated HCl solution of known concentration. Calculate the amount of concentrated HCl needed using the formula: C1V1 = C2V2, where C1 = concentration of concentrated HCl, V1 = volume of concentrated HCl needed, C2 = desired concentration (2 mol dm-3), and V2 = final volume of HCl solution. Mix the calculated amount of concentrated HCl with water to reach the final volume. Remember to wear appropriate personal protective equipment and handle concentrated acids with caution.
Why dip the wire in 6 M HCI before performing a flame test for each cation?
The HCl converts any contaminated impurities to the corresponding chlorides, which are more volatile and easily vaporized. That way, they are vaporized more easily and quickly in that flame, allowing the cation to create the correct color flame without contamination.
How do you make 5mM HCl?
To make a 5mM solution of HCl, you would need to dilute concentrated HCl (usually in the range of 10-12M) with water. The exact dilution volume will depend on the concentration of the concentrated HCl solution you have. It's crucial to wear appropriate personal protective equipment and handle concentrated HCl with care due to its corrosive nature.
