2.03 quiz

2. You have a solution that contains 4.0g of oxalic acid dissolved in 100 mL of water. This solution is placed in a separatory funnel, and then 100 mL of diethyl ether is added to the separatory funnel and an extraction is performed. (Diethyl ether and water are immiscible solvents.) Use the following constants to calculate how much oxalic acid is in each solvent after the extraction. Solubility of oxalic acid in water = 9.5 g / 100 mL Solubility of oxalic acid in ether = 16.9 g/100 mL

Three  students are comparing the solubility of Ce2(SO4 )3 , K2Cr2O7 and KClO3 at 50oC. Student 1 thinks that KClO3 has the greatest solubility. However, student 2 thinks that K2Cr2O7 has the greatest and student 3 thinks it is Ce2(SO4 )3.     Which student do you agree with and why?

Complete the following table. and then Circle the compound that is most soluble in water; cross out the compound that is least soluble in water. On which calculated quantity do you base your judgment? compound molarsolubility, x(M) [cations]eq(M) [anions]eq(M) Kspexpression Kspvalue CaF2 2.2×10-4 2.2×10-4 4.4×10-4 4x3 4.1×10-11 AgCl       x2 1.6×10-10 Ag2CrO4 8.7×10-5         Cu(OH)2     3.5×10-7     AG3PO4         2.6×10-18

= O SIMPLE REACTIONS Predicting the products of dissolution The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H₂O). Note: "major" chemical species are those present in concentrations greater than 10 mol/L. compound acetonitrile zinc bromide 10_0²1gNSIR17J8P3JH-IQg34RWY Ixj_1SoekWMaP1As1fEhnC179H4Slge9bsp-s_cWoyRspLW3tABOVd54TInRT-WiO_jWo53G6C... A magnesium sulfate Explanation Check formula CH, CN Zn Br₂ MgSO4 major species present when dissolved in water 0 0 M 99+ VUDU 0° a X 0,0,... 3 hulu 1/3 prime video {} Kirs © 2023 McGraw Hill LLC. All Rights…

Protecting the products of dissolution

given the following information (see image) determine ▲g° at 20.0°C

This answer is not one of the options given so it will not be correct. Please check the answer options given

Depending on culture conditions, glucose can be catabolized by yeast to produce ethanol and carbon dioxide, or can be diverted into other biosynthetic reactions. An inoculum of yeast is added to a solution containing 18 g/L glucose. After some time, only 3.5 g/L glucose remains while the concentration of ethanol is 6 g/L. CGH1206→2C2H,0+2CO2 Determine: a) The fractional conversion of glucose to ethanol (remember that fractional conversion values go from 0 to 1 and some glucose is diverted into other reactions) b) The fractional conversion of glucose, considering all the glucose that was consumed, not only the glucose converted to ethanol c) The yield of ethanol from glucose in gram/gram

Reagent Table Crop Reagent Amount Molecular Weight (g/mol) Molar millimoles equivalents Salcylamide 2g 137.1mg/mol 1.0 14.6mol ethanol 2.52g 149.9mg/mol 1.15 16.79mol Sodium Hypochlorite 22.88ml 74.44mg/mol 1.2 17.52mol 95% Ethanol 40ml solvent calculate theoretical yield using the chart, show calculations melting point 226celius, mass of the product 4.340 what is the percent of this?

Please help me fix the ICE table and Ksp.

Do you expect the solubility of Borax to increase or decrease as temperature increase? Select the option that best explains why. Solubility will decrease because as the temperature increases, - AH becomes smaller resulting in a smaller Ksp value. RT Solubility will increase because as the temperature increases, Solubility will increase because as the temperature increases, - Solubility will decrease because as the temperature increases, RT - ΔΗ RT becomes smaller resulting in a larger Ksp value. becomes smaller resulting in a smaller Ksp value. ΔΗ becomes smaller resulting in a larger Ksp value. RT

2N2 (g) + 5O2 (g) ↔ 2N2O5 (g) + 86.4 Joule           T = 200°C   P = 2 atm

A student is conducting their science experiment on the effect of caffeine on dogs. He has 3 groups of test subjects. The 1st group of dogs receives plain water. The 2nd group of dogs receives 10 mg of caffeine each, and the 3rd group receives 50 mg of caffeine each. He will measure their activity levels by recording how long each dog runs without stopping, after giving them the pills. What is the dependent variable in this experiment? OA. The amount of dogs tested. OB. The dogs that receive water. OC. The amount of activity. OD. The amount of caffeine given. Beset Selection

Which answer choice best describes a heterogeneous mixture?     A solution with different sized particles A solution that exhibits the Tyndall effect Mixtures which have a non-uniform composition Mixtures which have a uniform composition

150 140 130 120 110 100 90 80 70 60 50 -ха 40 FACI 30 20 KCIO 10 -Ce₂(SOs)s 0 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) • Rectangular Snip According the solubility curve graph above, the lowest temperature in which 50 g NH4Cl can be dissolved in 100 g water is- a 10°C b 50°C с 30°C Time left for this assessment: O d 60°C 67:47 Grams of solute per 100 g H₂O B NH NaNO3 KNO₂ KHÁC

Your TA gives you a solution of chlorophyll, the green pigment found in plant cells. Can you use the standard curve for betacyanin to determine the concentration of chlorophyll in this solution? Briefly explain why or why not.

Use the provided chart for this question. What is the minimum temperature required to dissolve at least 30g of potassium chloride in 100g of water?? 1.10 Celsius 2.20 Celsius 3.30 Celsius 4.40 Celsius  5.50 Celsius??

You are trying to dissolve ZnS (pKb = 2.5 x 10-22) in an aqueous solution. The dissolution enthalpy of ZnS is positive but small. Out of the following, which would NOT be a good way to increase the solubility of ZnS? (several possible answers) Increase the temperature of the solution. Add a base to the solution. Increase the volume of the solution. Add an acid to the solution. Decrease the temperature of the solution.

Select the chromate compound that is most soluble in water at 25°C on a molar basis using the following solubility data. Ksp BaCrO4 PbCrO4 Ag2CrO4 2.0 x 10-9 1.8 x 10-14 7.0 x 10-12 Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a BaCrO4 b Ag₂CrO4 с PbCrO4 d a None of these Cannot be determine

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Look at the solubility curves on the graph below and then answer the following Solubility Chart for Substance A, B, and C Grams per 100g of Water 888 90 40 30 20 10 0 0 10 10 20 20 30 30 40 50 60 Temperature C 70 70 80 90 100 questions. 1. Which substance is the most soluble at 0°C? At 100°C? 0°C also co 100° 2. How many grams of substance "B" will dissolve in 100g of water at 60°C? How about in 400g of water at the same temperature? 3. Which substance shows the least change in solubility from 0°C-100°C? 4. As you increase the temperature of the water, what happens to the solubility of "A"? 5. As you increase the temperature of the water, what happens to the solubility of "B"? 6. As you increase the temperature of the water, what happens to the solubility of "C"? 7. Which substance(s) are probably a solid? 8. Which substance(s) are probably a gas? 9. If you put 40g of "A" into 100g of water at 50°C the solution would be? 10. If you put 40g of "B" into 100g of water at 50°C the solution…

O KINETICS AND EQUILIBRIUM Using the solubility of a compound to calculate Ksp The solubility of CaF₂ in water at 25 °C is measured to be 0.017 L to calculate Ksp for CaF2. Round your answer to 2 significant digits. 0 x10 X 1/3 Use this information

Calculate the solubility of PbCO , in water at 25 °C. You'll find K, data in the ALEKS Data tab. sp Round your answer to 2 significant digits. dlo Ar alo Data BaSO4 1.08×10-10 СаСОз 3.36×10-9 CaF2 3.45x10-11 Co(OH)2 5.92×10-15 CuBr 6.27×10' o-9 CuCo3 1.4x10-10 Fe(OH)2 4.87×10¬17 PЬСОЗ 7.40×10-14 PbCro4 2.8×10-13 PBF2 3.3x10-8 Mg(OH)2 5.61×10¬12 Ni(OH)2 5.48×10-16 AgBrO3 5.38x10-5