Question

Describe an activity to show that an acid neutralises the property of a base

Answer 1

Answer:

Explanation take some phenolphthalein solution and add drop by drop hcl to it till the pink colour of the solution disappears. but when we again add a few drops of phenolphthalein ti it the pink colour of the solution reappears .

THIS SHOWS THAT AT FIRST HCl HAD NUETRALISED PHENOLPHTHALEIN THUS MAKING IT COLOURLESS .

Hope its useful

Answer 2

Answer:

take a test tube and add 10 ml dilute hydrochloric acid to it. observe its colour. now add 2 drops of phenolphthalein to it. gently shake it notice if there is any colour change now add a drop of sodium hydroxide solution with the help of a dropper and shake it gently notice if any colour appears in the solution keep adding sodium hydroxide solution dropwise and keep shaking till the colour of solution becomes pink add one drop of dilute hydrochloric acid to the this solution no colour change occurs when phenolphthalein is added to dilute hydrochloric acid the solution remains colourless.pink colour appears when sodium hydroxide is added to this solution