Physical Chemistry Answers

1. Search the web and enumerate steps how to measure the volume of the following:

a. A liquid

b. A cube

c. An irregularly shaped object

1.ph meter gives an electrical response proportional to the concentration of hydrogen ion. to convert this

response into ph, glass electrode must be calibrated against standard solution of known h+

concentration.

which of the following standard solution(s) is/are likely to be used?

a) ph 4.0 buffer b) ph 7.0 buffer c) ph 14.0 buffer and d) all of the above

In the presence of a catalyst, hydrogen peroxide decomposes to produce oxygen gas

2H20_{2 =} 2H₂0 + 0₂

Calculate thet mass of hydrogen peroxide is needed to produce l.0dm3 of oxygen gas at 25°C and 101.325kpa by using Ideal Gas Law. 

R = Gas Constant, 0.0821 L atm/mol · K 

Calculate the molarity of3.0g ascorbic acid, C₆H₈O₆ when dissolving in 200ml water.

Calculate the mole of for chemicals below.

155g of Ca₃(PQ₄)z

I0g of chlorine gas

0.5g of Sodium hydroxide

In the presence of a catalyst, hydrogen peroxide decomposes to produce oxygen gas

2H202 - 2H20 + 02

Calculate thet mass of hydrogen peroxide is needed to produce l.0dm3 ofoxygen gas at 25°C and 101.325kpa by using Ideal Oas Law. 

R = Gas Constant, 0.0821 L · atm/mol · K 

Calculate the molarity of3.0g ascorbic acid, C6HsO6 when dissolving in 200ml water.

Calculate the mole of for chemicals below.

155g of Ca3(PQ4)z

I0g of chlorine gas

0.5g of Sodium hydroxide

Balance the following equations using ion-electron method. (10 pts each)

A. Acidic Medium

1.MnO4-+ C2O42-Mn2+ + CO2

Balanced equation:

____________________________

Oxidant:

(1 pt) _________________

N2(g)+3H2(g) --->2NH3(g) If AH = -92.2kJ and AS3 -0.1987KJ/K, what is AG for the reaction at 475°C and at 5°C? Provide the answer in kJ. In each case, is the reaction spontaneous?