(a) Interpretation: The number of square meters in 1 kilometer needs to be deduced. Concept introduction: A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m). Mass is measured in terms of kilograms (kg). Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Solution Summary: The author explains the concept of a ‘unit of measurement’, which is used to express the quantity being measured.
The number of square meters in 1 kilometer needs to be deduced.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Interpretation Introduction
(b)
Interpretation:
The number of cubic centimeters in 1 cubic meter needs to be deduced.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Interpretation Introduction
(c)
Interpretation:
The number of square meters in 1 square mile needs to be deduced.
Concept introduction:
A ‘unit of measurement’ is a standard that is used to express the quantity being measured. For example: The SI unit for measuring distance or length is meters (m).
Mass is measured in terms of kilograms (kg).
Conversion factors are numbers that convert one unit of measurement to the other without changing the actual value.
Sample: Saline 0.900% (m/v), in sodium chloride (NaCl). Data: M.A. (g/mol): Na = 22.9898; K = 39.0983; Cr=51.9961; Ag = 107.8682; Cl = 35.453; N=14.0067; O = 15.9994. Material available in the laboratory's warehouse: Reagents: distilled water; standardized solution of silver nitrate (AgNO₃), at a concentration of 0.09980 mols/L; Potassium chromate solution (K₂CrO₄) 1%; ammoniacal ferric alum solution [Fe(NH₄)(SO₄)₂] and; nitrobenzene (or cooking oil, alternatively); 0.1000 mols/L potassium thiocyanate (KSCN) standard solution. Glassware: beakers of all sizes available on the market; 50, 100, 150, 200 and 250 ml Erlenmeyers; 10.00 and 25.00 mL volumetric pipettes; 15.00 mL burette; 30.00, 50.00 and 100.00 mL volumetric flasks
Calculate the molarity of saline, in terms of the NaCl concentration (concentration in mols/L).
(a) 0.900 mols/L
(b) 5.84 mols/L
(c) 0.154 mols/L
(d) 0.0154 mols/L
In the standardization of HCl using pure anhydrous sodium carbonate as the primarystandard for methyl orange as an indicator, 1.0 mL HCl was found to be equivalent to 0.05gof sodium carbonate (MW =106). The normality of HCl is: