Ch. 1 Test – Self Review Honors Chemistry Mrs. Klingaman

Match the statements a.Precision b.Accuracy c.Distillation d.Chromatography e.Filtration 1._____Separates a homogeneous solution based on differences in boiling points 2._____Several measurements close to one another 3._____Separates a mixture based on differences in solubility 4._____Measurements close t the true or accepted value 5._____Separates solid & liquid mixture based on particle size

Match the statements a.Precision b.Accuracy c.Distillation d.Chromatography e.Filtration 1.__C__Separates a homogeneous solution based on differences in boiling points 2.__A__Several measurements close to one another 3.__D__Separates a mixture based on differences in solubility 4.__B__Measurements close t the true or accepted value 5.__E__Separates solid & liquid mixture based on particle size

Measurements & Data State whether the following data is intensive or extensive and whether it is quantitative or qualitative: 1)The chlorine gas is green in color. 2)The density of the substance is 1.33 g/mL 3) The volume of the helium gas is 23 cm 3

Measurements & Data State whether the following data is intensive or extensive and whether it is quantitative or qualitative: 1)The chlorine gas is green in color. intensive & qualitative 2) The density of the substance is 1.33 g/mL intensive & quantitative 3)The volume of the helium gas is 23 cm 3 extensive & quantitative

States of Matter Describe each of the three states of matter. Be sure to include a description of if they each have definite or indefinate shapes & volumes, state a distinguishing properties for each, and give 1 elemental example of each.

States of Matter Describe each of the three states of matter. Be sure to include a description of if they each have definite or indefinate shapes & volumes, state a distinguishing properties for each, and give 1 elemental example of each. Solid – definite shape & volume, partciles are closely packed in ridged order & not compressible, example = iron Liquid – indefinate shape & definite volume, particles close together & can flow, example = mercury or bromine Gas – indefinite shape & volume, fills the volume of its container & particles very far apart, example = neon

Measurements & Data State whether the following scenarios represent high accuracy and high precision, low accuracy & high precision, or low accuracy and low precision. 1)Three volume measurements of a 4.2 mL give the following results: 2.2 mL, 3.2 mL, and 6.6 mL. 2)The density of water at room temperature is calculated to be g/mL, g/mL, and g/mL. 3)The mass of a paper clip (actually 1.2 g) is found to be 0.55 g, 0.57 g, and 0.52 g.

Measurements & Data State whether the following scenarios represent high accuracy and high precision, low accuracy & high precision, or low accuracy and low precision. 1)Three volume measurements of a 4.2 mL give the following results: 2.2 mL, 3.2 mL, and 6.6 mL. low accuracy & low precision 1)The density of water at room temperature is calculated to be g/mL, g/mL, and g/mL. high accuracy & high precision 3)The mass of a paper clip (actually 1.2 g) is found to be 0.55 g, 0.57 g, and 0.52 g. low accuracy & high precision

Metric Conversions: (set them up w/dimensional analysis) mm = ____________ dm cm = _____________ km km = _____________ m 4.134,076 nm = ______________ m Temperature Conversion: ºC = ______________ K

Answers: mm = 1 dm cm = 1.50 x km km = 650 m 4.134,076 nm = x m Temperature Conversion: ºC = K

Significant Figures/ Scientific Notation Identify the # of significant figures and rewrite in scientific notation

Answers: Identify the # of significant figures and rewrite in scientific notation (2) 1.6 x (4) x (3) 1.67 x (4) x ( 3) 1.60 x 10 -2

Complete the following problems using Sig. Figs = x 0.25 x = 3.(76.2 x 15) = 4

Answers: = 126 ( 0 deci. places) x 0.25 x = 610 (2 sig. figs) 3.(76.2 x 15) = 300 (1 sig. fig) 4

Use Dimensional Analysis and sig. figs to solve the following: 1.If the average student walks 3.63 miles around the school in a day, how many kilometers is this? 2.A piece of magnesium with a density of 1.74 g/cm 3 is found to have a volume of 15,600 µ L. What is the mass of this piece of Mg?

Use Dimensional Analysis and sig. figs to solve the following: 1.If the average student walks 3.63 miles around the school in a day, how many kilometers is this? 3.63 mi 5280 ft 12 in 2.54 cm 1m 1km = 5.84 km 1 mi 1 ft 1 in 100 cm 1000 m 1.A piece of magnesium with a density of 1.74 g/cm 3 is found to have a volume of 15,600 µ L. What is the mass of this piece of Mg? 1.74 g 1 cm mL 1 L 15,600 µ L = 27.1 g 1 cm 3 1 mL 1 L 10 6 µ L