A) B) C) D) E) ____ 3. An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The net ionic equation contains which of the following species (when balanced in standard form)? A) B) C) D) E) No net ionic
Epinephrine . Melatonin . Glucagon 25. Which hormone secreted by the pituitary gland functions to make the tubules more permeable to water, thereby increasing water’s absorption? A. Atrial Natriuretic Hormone B. Anti Diuretic Hormene C. Follicle Stimulating Hormone D. Insulin Like Growth Factor 26.
9. What is meant by “dynamic equilibrium”? EQUILIBRIUM APPLICATIONS: SOLUBILITY 1. a) Calculate the solubility of AgBr in pure water. Ksp of AgBr is 7.7(10-13 [8.8(10-7 mol/L] b) Calculate the solubility of AgBr in a 0.10 mol/L NaBr solution. [7.7(10-12 mol/L] 2.
A) How many mosm solute will 1 gram of NaCl yield? Show your calculations. (1gNaCl/1)*(1000mg/1gNaCl)(2/58mg)=34.5mOsm. 3. Mixed Solutions: If 1 mmole of glucose (180mg=1mOsm) and 1 mmole of NaCl (58mg=2mmOsm) are put into a beaker and distilled water added to make 1 liter, the osmolarity is 3 mOSm/L.
Percent H2O in Hydrate is equal 0.34/2.33=14.6% 3. The general formula of barium chloride hydrate is BaClg-nHZO, where n is the number of water molecules. Calculate the theoretical percent water for each value of n—divide the sum of the atomic masses due to the water molecules by the sum of all the atomic masses in the hydrate, and multiply the result by 100. Complete the table. | BaCl2 | BaCl2•H2O | BaCl2•2H2O | BaCl•3H2O | Sum of atomic masses (BaCl2) | 208.23 | 208.23 | 208.23 | 208.23 | Sum of atomic masses (nH2O) | 0 | 18.02 | 36.04 | 54.06 | Sum of atomic masses (hydrate) | 208.23 | 226.25 | 244.27 | 262.29 | Percent water in hydrate (theoretical) | 0% | 7.96% | 14.75% | 20.61% | In this lab we used a Balance, centigram
Overstate net income. b. Understate net income. c. No effect on net income. d. Not sufficient information to determine effect on net income.
The concentration of a solution is the amount of solute that is dissolved into each unit of solvent. In this lab, water (H2O) will be the solvent and sugar/sucrose (C12H22O11). When the density of the solute is greater than the density of the solvent, the density is directly proportional to the concentration of the solute. The relative density of the solute to the solvent can be observed by placing some solute into the solvent without mixing. If the solute floats, then the density of the solvent is greater than the density of the solute.
Part C: Density of Sodium Chloride (NaCl) Solution, a sample of NaCl was obtained and measured using a 100mL beaker and a 10mL pipet to determine the concentration of the solution. In order to obtain the appropriate result, a calibration graph and density measurement was used to determine the concentration of the sodium chloride solution. In conclusion, based on the water temperature of 21.8°C in part A’s graduated cylinder experiment obtained, it was determined that the average density was .0973g/mL with a percentage error of 2.5%. When graphed the measurement was equal to Y=0.988x. Part B: The graduated pipet’s average density at 22.3 °C was determined to be 0.9785g/mL with a percentage error of 1.89% shows the graduated pipet to be more accurate and precise.
Produces essential proteins and clotting factors for the blood and regulates metabolism and cholesterol. Gall Bladder – Stores bile secreted by liver. Bile is used to help dissolve fats in the small intestine. Pancreas – Functions both as an exocrine gland and an endocrine gland. Exocrine portion secretes digestive enzymes carried to the duodenum.
(Kf for water = 1.86 °C /m) A. 0.258 °C B. -0.258 °C C. 2.58 °C D. -2.58 °C _____ 4. What is the osmotic pressure produced by a 1.20 M glucose