Fizzing will occur more strongly in test tube A than in test tube B. As test tube A contains hydrochloric acid (HCl) which is a strong acid that reacts vigorously with magnesium whereas acetic acid CH3COOH is weak acid. Being a strong acid, therefore hydrogen gas evolved a faster speed that's why iRead more
Fizzing will occur more strongly in test tube A than in test tube B. As test tube A contains hydrochloric acid (HCl) which is a strong acid that reacts vigorously with magnesium whereas acetic acid CH3COOH is weak acid. Being a strong acid, therefore hydrogen gas evolved a faster speed that’s why it’s more fizzing occurs.
(a) Solution D is neutral having pH 7 (b) Solution C is strong alkaline with pH 11 (c) Solution B is strong acidic with pH 1 (d) Solution A is weak acidic with pH 4 (e) Solution E is weak alkaline with pH 9 11 < 9 < 7 < 4 < 1. The pH can be arranged in the increasing order of the concentRead more
(a) Solution D is neutral having pH 7
(b) Solution C is strong alkaline with pH 11
(c) Solution B is strong acidic with pH 1
(d) Solution A is weak acidic with pH 4
(e) Solution E is weak alkaline with pH 9
11 < 9 < 7 < 4 < 1. The pH can be arranged in the increasing order of the concentration of hydrogen ions.
The acidic behaviour of acid is due to the presence of hydrogen ions. The acids will not show its acidic behaviour in the absence of water, this is because acids do not dissociate to produce H+(aq) ions in the absence of water.
The acidic behaviour of acid is due to the presence of hydrogen ions. The acids will not show its acidic behaviour in the absence of water, this is because acids do not dissociate to produce H+(aq) ions in the absence of water.
Distilled water is a pure form of water that does not contain any ionic species. Therefore, it does not conduct electricity. Rain water, being an impure form of water, contains many ionic species such as acids and therefore it conducts electricity.
Distilled water is a pure form of water that does not contain any ionic species. Therefore, it does not conduct electricity. Rain water, being an impure form of water, contains many ionic species such as acids and therefore it conducts electricity.
Because glucose and alcohol do not dissociate into ions. Therefore these solution are not considered as acid - Experimental verification : Procedure : Two nails are fitted in a cork and they are kept in a 100 ml beaker. Then the nails are connected to the two terminals of the battery of 6 volt alongRead more
Because glucose and alcohol do not dissociate into ions. Therefore these solution are not considered as acid –
Experimental verification :
Procedure : Two nails are fitted in a cork and they are kept in a 100 ml beaker. Then the nails are connected to the two terminals of the battery of 6 volt along with a bulb and a switch. Now some dilute HCl is added in the beaker and allows the current to pass through the circuit. The same experiment is carried out with glucose and alcohol solutions separately in place of HCl.
Observations :
The bulb glows only in HCl solution only. Because HCl solution dissociates into H+ and Cl– ions which conduct electricity whereas glucose and alcohol solutions do not dissociate into ions and so, these solutions do not conduct electricity. So the bulb doesn’t glow.
Interpretation :
Activity above hereby proved that all acids contain hydrogen but not all compounds that contain hydrogen are acids. Therefore compounds such as alcohols and glucose contain hydrogen, and are not categorised as acids.
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?
Fizzing will occur more strongly in test tube A than in test tube B. As test tube A contains hydrochloric acid (HCl) which is a strong acid that reacts vigorously with magnesium whereas acetic acid CH3COOH is weak acid. Being a strong acid, therefore hydrogen gas evolved a faster speed that's why iRead more
Fizzing will occur more strongly in test tube A than in test tube B. As test tube A contains hydrochloric acid (HCl) which is a strong acid that reacts vigorously with magnesium whereas acetic acid CH3COOH is weak acid. Being a strong acid, therefore hydrogen gas evolved a faster speed that’s why it’s more fizzing occurs.
See lessFive solutions A,B,C,D and E when tested with universal indicator showed pH as 4,1,11,7 and 9, respectively. Which solution is
(a) Solution D is neutral having pH 7 (b) Solution C is strong alkaline with pH 11 (c) Solution B is strong acidic with pH 1 (d) Solution A is weak acidic with pH 4 (e) Solution E is weak alkaline with pH 9 11 < 9 < 7 < 4 < 1. The pH can be arranged in the increasing order of the concentRead more
(a) Solution D is neutral having pH 7
(b) Solution C is strong alkaline with pH 11
(c) Solution B is strong acidic with pH 1
(d) Solution A is weak acidic with pH 4
(e) Solution E is weak alkaline with pH 9
11 < 9 < 7 < 4 < 1. The pH can be arranged in the increasing order of the concentration of hydrogen ions.
See lessWhy do acids not show acidic behaviour in the absence of water?
The acidic behaviour of acid is due to the presence of hydrogen ions. The acids will not show its acidic behaviour in the absence of water, this is because acids do not dissociate to produce H+(aq) ions in the absence of water.
The acidic behaviour of acid is due to the presence of hydrogen ions. The acids will not show its acidic behaviour in the absence of water, this is because acids do not dissociate to produce H+(aq) ions in the absence of water.
See lessWhy does distilled water not conduct electricity, whereas rain water does?
Distilled water is a pure form of water that does not contain any ionic species. Therefore, it does not conduct electricity. Rain water, being an impure form of water, contains many ionic species such as acids and therefore it conducts electricity.
Distilled water is a pure form of water that does not contain any ionic species. Therefore, it does not conduct electricity. Rain water, being an impure form of water, contains many ionic species such as acids and therefore it conducts electricity.
See lessCompounds such as alcohols and glucose also contain hydrogen but are not categorised as acids. Describe an Activity to prove it.
Because glucose and alcohol do not dissociate into ions. Therefore these solution are not considered as acid - Experimental verification : Procedure : Two nails are fitted in a cork and they are kept in a 100 ml beaker. Then the nails are connected to the two terminals of the battery of 6 volt alongRead more
Because glucose and alcohol do not dissociate into ions. Therefore these solution are not considered as acid –
Experimental verification :
Procedure : Two nails are fitted in a cork and they are kept in a 100 ml beaker. Then the nails are connected to the two terminals of the battery of 6 volt along with a bulb and a switch. Now some dilute HCl is added in the beaker and allows the current to pass through the circuit. The same experiment is carried out with glucose and alcohol solutions separately in place of HCl.
Observations :
The bulb glows only in HCl solution only. Because HCl solution dissociates into H+ and Cl– ions which conduct electricity whereas glucose and alcohol solutions do not dissociate into ions and so, these solutions do not conduct electricity. So the bulb doesn’t glow.
Interpretation :
Activity above hereby proved that all acids contain hydrogen but not all compounds that contain hydrogen are acids. Therefore compounds such as alcohols and glucose contain hydrogen, and are not categorised as acids.
See less