Chemistry 1025 Lab Final (A+ Guaranteed)Best.

Chemistry 1025 Lab Final (A+ Guaranteed) What two criteria must be met for a compound or a solution to be an electrolyte? Choose matching definition 1) the compound or solution must contain ions not just neutral molecules 2) those ions must be free to move 1)Orthophosphates are the inorganic forms of phosphate, such as PO4, HPO4, H2PO4.Found in fertilizers. 2) Organically bound phosphate- found in human or animal waste and decaying matter. 3) Condensed phosphates-added to water supplies and industrial processes to prevent scaling and corrosion. was commonly found in detergent. Nitrate ions convert hemoglobin to a form that can no longer transport oxygen in the baby's blood. High nitrate levels (above 10 mg/L) in drinking water provided to babies can cause it. 1. select the axes. 2)Set the scales for the axes (they do not have to be the same. 3)Plot the data. 4) Draw a curve for the best fit or straight line if that's appropriate. 5) Title your graph. Sodium nitrate Choose matching definition NaNO3 CuNO3 Cuso₄ H2SO4 In regards to significant figures, in multiplication and division, the final answer is written so it has the same number of digits as the measurement with the fewest significant figures Choose matching definition 670 /5.3 = 126.41 (126) heat per gram of fuel = heat absorbed (cal) / weight of fuel burnt. animal feedlots, agricultural run-off, treated municipal water being returned to streams, urban runoff Example: 24.65 x 0.67 = 16.5155 17 four SF two SF calculator display final answer rounded to two SF 20.0 (g) H2O x (1) x { 55.5 - 22.0 } = 670 heat absorbed (cal) = mass of water (g) x temp change Calculate the total amount of heat (in cal) absorbed by 20.0 g of water heated as described in the experimental procedure above. The initial temperature of the water was 22.0oC, and the final temperature after heating was 55.5oC. Choose matching definition 20.0 (g) H2O x (1) x { 55.5 - 22.0 } = 670 heat absorbed (cal) = mass of water (g) x temp change 1) the compound or solution must contain ions not just neutral molecules 2) those ions must be free to move animal feedlots, agricultural run-off, treated municipal water being returned to streams, urban runoff 670 /5.3 = 126.41 (126) heat per gram of fuel = heat absorbed (cal) / weight of fuel burnt. give an example of a pure (or exact) number Choose matching definition less than 1 mg/L dozen eggs 1 yard equals 3 feet Carbon dioxide making carbonic acid Reported as total phosphate concentration. What process converts the nitrogen-containing ion in part a) into the nitrogen-containing ion in part b)? Choose matching definition Carbon dioxide making carbonic acid nitrate ion concentration of dissolved solute equals its solubility nitrification or nitrogen fixation cupric nitrate Choose matching definition A compound that consists of positive and negative ions, such as sodium chloride CuNO3 NaNO3 NO2 The data listed in question 2 was obtained by burning 5.3 g of kerosene. Calculate the calories released per gram of kerosene burned. Choose matching definition 670 /5.3 = 126.41 (126) heat per gram of fuel = heat absorbed (cal) / weight of fuel burnt. 20.0 (g) H2O x (1) x { 55.5 - 22.0 } = 670 heat absorbed (cal) = mass of water (g) x temp change animal feedlots, agricultural run-off, treated municipal water being returned to streams, urban runoff Example: 24.65 x 0.67 = 16.5155 17 four SF two SF calculator display final answer rounded to two SF What are typical nitrate levels in freshwater? Choose matching definition nitrification or nitrogen fixation Reported as total phosphate concentration. less than 1 mg/L dozen eggs 1 yard equals 3 feet After carefully measuring the mass and volume of aluminum, a student calculates the density of aluminum to be 2.95 g/mL. According to the CRC Handbook of Chemistry and Physics, the density of aluminum is 2.702 g/mL. What is the percent error in the student's measured density? Choose matching definition concentration of dissolved solute equals its solubility the length of a piece of string. the width of a room percent error = [x-y] / y x 100 x=your measured value y=the accepted value 20.0 (g) H2O x (1) x { 55.5 - 22.0 } = 670 heat absorbed (cal) = mass of water (g) x temp change Describe the process of eutrophication Choose matching definition a. a nonzero digit 4.5 g 2 122.35.m 5 b. a zero digit between nonzero digits 205 m 3 5.082 kg 4 c. a zero at the end of a decimal number 50. L 2 25.0 oC 3 d. any digit in the coefficient of a number 4.0 x 105 m 2 written in scientific notation High nitrate ion levels cause excessive growth of aquatic plants and algae. This reduces water clarity which induces accelerated plant death. Decomposing dead plants on bottom of water body release even more nitrogen into the water that can lower dissolved oxygen levels resulting in a dead stinky body of water that nothing can live in. Nitrate ions convert hemoglobin to a form that can no longer transport oxygen in the baby's blood. High nitrate levels (above 10 mg/L) in drinking water provided to babies can cause it. 1. select the axes. 2)Set the scales for the axes (they do not have to be the same. 3)Plot the data. 4) Draw a curve for the best fit or straight line if that's appropriate. 5) Title your graph. Clearly define precision and accuracy Choose matching definition 1)Orthophosphates are the inorganic forms of phosphate, such as PO4, HPO4,H2PO4.Found in fertilizers. 2) Organically bound phosphate- found in human or animal waste and decaying matter. 3)Condensed phosphates-added to water supplies and industrial processes to prevent scaling and corrosion. was commonly found in detergent. Fertilizers, animal and human waste, decaying organic matter, industrial processes. Accuracy is how closely the measured values lie to the true values. Precision is how closely the measured values lie to one another. Nitrate ions convert hemoglobin to a form that can no longer transport oxygen in the baby's blood. High nitrate levels (above 10 mg/L) in drinking water provided to babies can cause it. Is the vertical axis the x or the y axis? Choose matching definition x ... y abscissa (x) endothermic Choose matching definition absorbs heat from the environment Nitrous acid (HNO2) Nitric acid (HNO3) mass of solute that dissolves in 100 g of water at a certain temperature. concentration of dissolved solute equals its solubility electrolyte Choose matching definition mass of solute that dissolves in 100 g of water at a certain temperature. Accuracy is how closely the measured values lie to the true values. Precision is how closely the measured values lie to one another. a substance that dissolves in water to give a solution that conducts an electric current solute concentration is solution is less than its solubility A 150.0 mL sample of wetlands water requires 25.00 mL of a 0.0250 M H2SO4 solution for neutralization. Calculate the molarity of CaCO3 in the sample.Given the previous result, calculate the alkalinity of the sample in question 1. Choose matching definition ... HNO3 NO2 SO3 + H2O ----- H2SO4 Predict whether each of the following would be an electrolyte or a non-electrolyte. Note that (s) = solid and (aq) = aqueous (or dissolved in water).NH4OH (aq) Choose matching definition Non CuNO3 ... Carbon dioxide making carbonic acid the vertical axis is the ___________? Choose matching definition ordinate (y) greater than .1 mg/L y dissociate Write the dissociation or ionization reaction of the following compounds:HNO3 Choose matching definition Non Ba + H2O greater than .1 mg/L ... define water solubility Choose matching definition Fertilizers, animal and human waste, decaying organic matter, industrial processes. mass divided by volume a substance that dissolves in water to give a solution that conducts an electric current mass of solute that dissolves in 100 g of water at a certain temperature.