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Draw the major organic product(s) for the following.
- You may assume each reaction occurs just one time.
- Show or depict any relevant stereochemistry in the products [R/S or E/Z labels are not needed].
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- The solubility of PbCO3 in water at 25°C is measured to be 7.3x10−5g/L. Use this information to calculate Ksp for PbCO3. Round your answer to 2 significant digits.A student dissolves 13.7 g of potassium hydroxide KOH in 200. g of water in a well-insulated open cup. He then observes the temperature of the water rise from 22.0°C to 34.0°C over the course of 7.3 minutes. KOHs + K+aq -> OH−aq You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the correct number of significant digits. Is this reaction exothermic, endothermic, or neither? If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. Calculate the reaction enthalpy ΔHrxn per mole of KOH .1. (answer the questions in the tan boxes in the tables below each question) A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation. Beaker Number 1 2 3 4 Amount of Water (mL) 100 100 100 100 Amount of Water (mL) Trial 1 Temperature of Temperature of Amount of Sugar Sugar (°C) Water (°C) Dissolved (g) 20 20 20 20 Temperature of Sugar 5 10 15 20 185 189 194 204 Temperature of Water Terms Variable Constant Amount of Sugar Dissolved
- __FeCl3 (aq) + __ KSCN (aq) > __Zn (S) + __HCl (aq) > __Cu (S) + __HCl (aq) > __H2O2 (aq) > __CuSO4 (S) +__H2O (I) > __NaCl (aq) + __KNO3 (aq) > What are the reaction types?A certain substance X has a normal boiling point of 131.9°C and a molal boiling point elevation constant =Kb·1.78°C·kgmol−1. A solution is prepared by dissolving some urea ((NH2)2 CO) in 600.g of X. This solution boils at 133.7°C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.A student dissolves 12.4g of ammonium nitrate (NH4NO3) in 200.g of water in a well-insulated open cup. She then observes the temperature of the water fall from 21.0°C to 16.9°C over the course of 7 minutes. NH4NO3(s) → NH+4(aq) + NO−3(aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to 2 significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the known and published values for this reaction. 1. Is this reaction exothermic, endothermic, or neither? 2.If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. = kJ 3.Calculate the reaction enthalpy ΔHrxn per mole of NH4NO3. = kJ/mol
- Is the concentration of the solution prepared in the question below only approximate because sodium hydroxide is not a primary standard? * Find the mass in grams of sodium hydroxide that will be required to prepare a solution with a concentration of 0.500 mol·dm⁻³ in a 250 cm³ volumetric flask. [Round the answer to three decimal places. Do not type in the unit. Use a decimal point.] *1 A certain liquid X has a normal boiling point of 144.80 °C and a boiling point elevation constant K,=2.39 °C•kg•mol A solution is prepared by dissolving some glycine (C,H,NO,) in 650. g of X. This solution boils at 148.5 °C. Calculate the mass of C,H,NO, that was dissolved. Round your answer to 2 significant digits. olo ArThe 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 3
- 4. A 100 mL solution was prepared by dissolving 10.00 g of CaSO4 (MW= 136. 14 g/mol) in water. The density of the solution was found to be 1.15 g/ml at 25 C. Find the new boiling and freezing temperature of water in this solution. Answers in 2 decimal places. no need to write the unit. New boiling point = [A] %3D New Freezing point = [B]is 2OF2(g)=O2(g)+2F2(g) endothermic,isothermic,or exothermic- 1 A certain substance X has a normal freezing point of – 10.2 °C and a molal freezing point depression constant K,=4.75 °C·kg•mol *. A solution is prepared by dissolving some urea ((NH,) CO) in 500. g of X. This solution freezes at – 12.1 °C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits. g x10
