1) Explain why between phenolphethalein and bromothymol blue, phenolphthalein was the better option for the titration. 2)Why is it important to rinse glassware with water than the solution before using it with the solution?

Hi. where is the graph?

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

The metal is named first

The answer is accuracy