AP* Chemistry: The Central Science (NASTA Edition)
14th Edition
ISBN: 9780134650951
Author: Brown and Lemay
Publisher: PEARSON
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Students have asked these similar questions
In a flask, you heat a mixture of 735.4 g of sodium nitrate and 700.0 grams of water until all of the sodium nitrate
has just been dissolved. At what temperature does this occur? When you examine the solution later, the
temperature is 25°C and you notice a white powder in the beaker. What has happened? What is the mas of the
white powder?
Solubility vs. Temperature
140
KI
130
120
NaNO,
gases
110
sólids
100
KNO,
90
80
HCI
NH,CI
70
60
NH3
KCI
50
40
NacT
30
KCIO,
20
10
SO2
0 10 20 30 40 50 60 70 80 90 100
Temperature °c
Solubility (grams of solute/100 g H2O)
5. In a flask, you heat a mixture of 735.4 g of sodium nitrate and 700.0 grams of water until all of the sodium nitrate
has just been dissolved. At what temperature does this occur? When you examine the solution later, the
temperature is 25°C and you notice a white powder in the beaker. What has happened? What is the mas of the
white powder?
Solubility vs. Temperature
140
KI
130
120
NANO,
110
gases
solids
100
KNO,
90
80
HCI
NH,CI
70
60
NH3
KCI
50
40
Nac
30
KCIO,
20
10
10 20 30 40 50 60 70 80 90 100
Temperature °c
Solubility (grams of solute/100 g H¿O)
Exactly 15.0g of a substance can be dissolved in 150.0g of water. What is the solubility of the substance in grams per 100g of water?
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- A rebreathing gas mask contains potassium superoxide, KO2, which reacts with moisture in the breath to give oxygen. 4KO2(s)+2H2O(l)4KOH(s)+3O2(g) Estimate the grams of potassium superoxide required to supply a persons oxygen needs for one hour. Assume a person requires 1.00 102 kcal of energy for this time period. Further assume that this energy can be equated to the heat of combustion of a quantity of glucose, C6H12O6, to CO2(g) and H2O(l). From the amount of glucose required to give 1.00 102 kcal of heat, calculate the amount of oxygen consumed and hence the amount of KO2 required. The ff0 for glucose(s) is 1273 kJ/mol.arrow_forwardWhat is the difference between (a) mass and density? (b) an extensive and an intensive property? (c) a solvent and a solution?arrow_forwardA 15.5 g sample of sodium carbonate is added to a solution of acetic acid weighing 19.7 g. The two substances react, releasing carbon dioxide gas to the atmosphere. After reaction, the contents of the reaction vessel weigh 28.7 g. What is the mass of carbon dioxide given off during the reaction?arrow_forward
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- The solubility of a substance is 12.0g per 100g of water at 20.0°C. It is 18.0g per 100.g of water at 60.0°C. How many grams of the substance can crystallize from a saturated solution that contains 200.g of water at 60.0°C if the solution is cooled to 20.0°C?arrow_forwardSuppose that you are doing an experiment as part of your Capstone Design Project. A glass vessel originally contains 100 mL of fresh water. Then water containing 1 g/mL of NaCl is poured into the vessel at a rate of 2 mL/min, and the mixture is allowed to leave at the same rate. After 10 minutes the process is stopped, and fresh water is poured into the vessel at a rate of 2 mL/min, with the mixture again leaving at the same rate. Find the amount of NaCl in the vessel at the end of an additional 10 min.arrow_forwardThe solubility of a substance is 30 g per 100 mL of water at room temperature, 50 g per 100 mL of water at 80 ∘C. A student mixed 40 g of this substance with 100 mL of water at room temperature (stage 1), and then heated the mixture to 80 ∘C (stage 2). The mixture is then slowly cooled down to room temperature without any precipitation (stage 3). Finally, the student added a small crystal to the mixture and saw precipitation took place. This mixture is supersaturated at stage 2 heterogeneous at stage 1 homogeneous at stage 4 saturated at stage 3arrow_forward
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