Question

EQUL Uingen Vachelor Pre-Laboratory Assignment 1. Although you will use only amounts of the solutions in this experiment, you must be care of some of the hands of the solutions. com montone hands of an uno (1) 3. A student performed an experiment a r to the one that you will perform but e nt solutions The student's data are presented in the table below Students for estimating the pho tos nocate catre 0.1M Thymol Mt Bromotor solution Be Red NaNO red Yollow yellow NaNO, green yellow blue HNO, red yellow HNO, Orange (2) HCIONOH (1) is a 0.1M NaNO, solution acidic or bask? What experimental evidence supports your answer? 2. Use the information in Table 1 to determine the color you would expect to see in the following (1) Apr 11 solution containing phenorth Indicator List the addi t ion) studied by the student 2) ApH 11 solution containing Alzain Yollow (3) An acid rain sample with a pH of containing Methyl Red indicator What experimental evidence supports your answer?

Answer 1

1. a) Conc. NH₃ Solution Conc. NH₂ solection is highly corrosive. It can cause burn to skin and also causes nausea, vomiting, headache when directly inhaled.

1. 2 HCl : All is a strong an which can cause burn, rashes if fell on skin. Inhaling directly vapours of Hol can also cause dizziness, nausea or vomiting NaOH! Being alkaline in nature it is highly corrosive in nature. Due to sticky nature it sticks to hand thereby tearing the skin. It should I be handled with utmost care. 2. 1) Phenolphthalien appears fink is pH I around !!! (2) Alizarin yellow solution appears Violet in pH-11 3) Methy red containing sample at PH=5 appears Red