Determine the changes that occur when the samples are tested using the following indicators:
1.
|
Sample solution
|
Red litmus
|
|
\(HCl\)
|
|
|
\(NH_4OH\)
|
2.
|
Sample solution
|
Blue litmus
|
| \(HCl\) | |
| \(NH_4OH\) |
3.
|
Sample solution
|
Phenolphthalein
|
| \(HCl\) | |
| \(NH_4OH\) |
4. \(HCl\) is the sample solution and it reacts to methyl orange. The colour change is .