YES
Yes
if your grout had not been seal then it will be hard to clean and if you clean with acid the grout will be change color.
NO!
Muriatic acid can be used to clean dishwashers. Muriatic acid is very strong and should only be used occasionally for cleaning the dishwasher.
Give it a week, and make sure you dilute the muriatic acid.
The alternatives to using muriatic acid to clean grout smears from natural stone is a mixture of water and vinegar. First wipe away heavy grout with a damp sponge, then apply the vinegar-water mixture to the affected area. Allow it to sit for a few minutes before using a scrubbing brush to remove the stains. Wash away the residue with a damp sponge.
Yes, muriatic acid can be used to clean old tubs. It is a strong acid that can help remove mineral deposits, soap scum, and grime from the surface of the tub. However, it is important to use it with caution as it can be harsh and may require proper ventilation and protective gear.
You can use muriatic acid to clean or etch aluminum. Do not let it set too long or it will eat through. Use caution since muriatic acid is very caustic.
no
To clean concrete among other uses
I would not recommend using Muriatic Acid. It is far to strong for this use. Purchase a good industrial carburetor cleaner.
Muriatic acid is highly corrosive to certain metals. Would not be recommended for cabinet hardware cleaning, for sure.