please help 1-5 , thanks you

1. Describe how to properly run a centrifuge so that it is balanced. 2. Complete the sentences with the appropriate words: Use litmus paper to test if a solution is basic. This litmus paper will turn blve if the solution is basic. 3. What chemical reactivity is specific to Group I cations in qualitative analysis? 4. Explain the purpose of running a "known" in qualitative analysis. 5. Write the molecular form of the chemical reaction that shows solid silver chloride reacting with aqueous ammonia to form a complex ion. Include the physical state ((s), (aq), etc.) for all species. Underline all solids