Homework Answers
Solutions 1. Identify the solvent and solute(s) in each of the following solutions. Note that there...
Solutions 1. Identify the solvent and solute(s) in each of the following solutions. Note that there may be more than one solute in a solution. A 20 g of calcium chloride CaCl2 dissolved in 100 g of water. Solvent Solute(s) B Air which contains 20.95% oxygen, 0.93% argon, 78.09% nitrogen and 0.04% carbon dioxide. Solvent Solute(s) C Rubbing alcohol which consists of 70% isopropyl alcohol and 30% water. Solvent Solute(s) D Alloy 7705 which consist of 6% zinc, 2.3% magnesium,...
6) How many moles of solute particles would be formed from one mole of each of...
6) How many moles of solute particles would be formed from one mole of each of the above olid solutes when it dissolves in water? (Count the ions in solution for ionic compounds. For CaCl2 (s) -Ca2(aq) 2 Cl (aq), s For polar covalent compounds, the number is 1) o there are 3 moles of particles for one mole of CaCl2 NaCl MgF2 NaHCO3 citric acid sucrose
Reaction 1: Vinegar (acetic acid) and sodium bicarbonate CH3COOH(aq) + NaHCO3(s) -- CH3COONa (aq) + H2O(l)...
Reaction 1: Vinegar (acetic acid) and sodium bicarbonate CH3COOH(aq) + NaHCO3(s) -- CH3COONa (aq) + H2O(l) + CO2(g) Reaction 2: Vinegar (acetic acid) and ammonia CH3C02H(aq) + NH3(aq)-> CH3CO2NH4(aq) Observe the following reaction: N2(g) + O2(g) XX2NO(g) (reaction 4) Reaction 5: Dissolution of ammonium chloride: NH,Cl(s)-- NH (aq) + Cl(aq) AH = 14.4 kJ/mol (reaction 5) The following endothermic reaction does not occur: CO2(g) + H20(L) X H2CO3(aq) (reaction 6) 2N205(g)-→ 4NO2(g) + O2(g) AH = +13.1 kcal (reaction 7)...
Example: 1 3 На 2 NH USE: N2 + a) If we need to produce eight moles of ammonia, how many moles of nitrogen and hydr...
Example: 1 3 На 2 NH USE: N2 + a) If we need to produce eight moles of ammonia, how many moles of nitrogen and hydrogen gases are required? b) If we need to produce eighty moles of ammonia, how many moles of nitrogen and hydrogen gases are required? Example: 2 3020) 2KCI(s)+ a) How many grams of KCl will be produced if 25.8 moles of potassium chlorate is heated? 2KCIO3) b) How many gram(s) of oxygen gas is produced...
1. Solubility in WATER Check solubility of four solutes in water (H2O). For each solute record...
1. Solubility in WATER Check solubility of four solutes in water (H2O). For each solute record how many teaspoons dissolved in 1/2 cup of water. NaCl: Start out with 4 small glasses (cups) and add 1/2 cup of water to each. Put 1/2 level teaspoon (tsp) of salt (NaCl) into the first cup and stir. If it dissolves within 1 minute; add another 1/2 tsp of salt and stir. Count the number of 1/2 tsps you are adding. Repeat until...
6. Vinegar is 5.00% (m/v) acetic acid (CH3COOH). How many milliliters of vinegar would you need...
6. Vinegar is 5.00% (m/v) acetic acid (CH3COOH). How many milliliters of vinegar would you need to react with an excess of baking soda (NaHCO3) in order to generate 10.0 L of carbon dioxide gas at 1.05 atm and a temperature of 25.0°C? 7. Shown below is the aqueous reaction of KNOX, HCl, and SnCl2. 2 KNO2 (aq) + 6 HCl(aq) + 2 SnCl2 (aq) → 2 SnCla (aq) + N20 (g) + 3 H20 (1) + 2 KCl (aq)...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water to prepare a 0.200 M solution. What is the volume of the resulting 0.200 M solution? Or asked another way, to what volume must the original solution be diluted? (3 points) 2) Lithium hydroxide, LiOH, is used in spacecraft to absorb the carbon dioxide exhaled by astronauts. Given 1.3 kg of LiOH, how many kg of CO2 can be absorbed? (10 Pts. The reaction...
Homework #7A Name: Due date: 3-16-20 1. How many moles of water, H20, contain 9.03 *...
Homework #7A Name: Due date: 3-16-20 1. How many moles of water, H20, contain 9.03 * 10molecules of water? 2. How many molecules are present in 4.9 moles of L,CO3. 3. How many moles of oxygen are present in 4.9 moles of L.COM 4. How many Li atoms are in 4.5 moles of Li? 5. Calculate the mass, in grams, for 3.75 10 molecules of C2Hs. 6. Calculate the mass, in grams, for 3.5 moles of CHO. 7. Calculate the...
CHEM 110 Online Lab Instructions for Exp 6 Molar Masses as Conversion Factors Part 1: The...
CHEM 110 Online Lab Instructions for Exp 6 Molar Masses as Conversion Factors Part 1: The Chemical Reaction LET'S WATCH THE BALLOON INFLATE Let us do a simple "chemical reaction and see what happens when these two common household chemicals are put together: vinegar (HC,H,O2 -aqueous acetic acid solution) and baking soda (NaHCO, --sodium bicarbonate). Vinegar is a solution of acetic acid and water. Vinegar is used in salad dressings, to dye eggs, and in other cooking uses. Baking soda...
Pt.1 predict whether soluble or insoluble. Pt 2. Miscible or immiscible Pt 3 and beyond- answering...
Pt.1 predict whether soluble or insoluble.
Pt 2. Miscible or immiscible
Pt 3 and beyond- answering questions
1. For each of the following pairs of solute and solvent, predict whether the solute would be soluble or insoluble. After making your predictions, you can check your answers by looking up the compounds in The Merck Index or the CRC Handbook of Chemistry and Physics. Generally, The Merck Index is the easier reference book to use. If the substance has a solubility...
Solutions 1. Identify the solvent and solute(s) in each of the following solutions. Note that there may be more than one solute in a solution. A 20 g of calcium chloride CaCl2 dissolved in 100 g of water. Solvent Solute(s) B Air which contains 20.95% oxygen, 0.93% argon, 78.09% nitrogen and 0.04% carbon dioxide. Solvent Solute(s) C Rubbing alcohol which consists of 70% isopropyl alcohol and 30% water. Solvent Solute(s) D Alloy 7705 which consist of 6% zinc, 2.3% magnesium,...
6) How many moles of solute particles would be formed from one mole of each of the above olid solutes when it dissolves in water? (Count the ions in solution for ionic compounds. For CaCl2 (s) -Ca2(aq) 2 Cl (aq), s For polar covalent compounds, the number is 1) o there are 3 moles of particles for one mole of CaCl2 NaCl MgF2 NaHCO3 citric acid sucrose
Reaction 1: Vinegar (acetic acid) and sodium bicarbonate CH3COOH(aq) + NaHCO3(s) -- CH3COONa (aq) + H2O(l) + CO2(g) Reaction 2: Vinegar (acetic acid) and ammonia CH3C02H(aq) + NH3(aq)-> CH3CO2NH4(aq) Observe the following reaction: N2(g) + O2(g) XX2NO(g) (reaction 4) Reaction 5: Dissolution of ammonium chloride: NH,Cl(s)-- NH (aq) + Cl(aq) AH = 14.4 kJ/mol (reaction 5) The following endothermic reaction does not occur: CO2(g) + H20(L) X H2CO3(aq) (reaction 6) 2N205(g)-→ 4NO2(g) + O2(g) AH = +13.1 kcal (reaction 7)...
Example: 1 3 На 2 NH USE: N2 + a) If we need to produce eight moles of ammonia, how many moles of nitrogen and hydrogen gases are required? b) If we need to produce eighty moles of ammonia, how many moles of nitrogen and hydrogen gases are required? Example: 2 3020) 2KCI(s)+ a) How many grams of KCl will be produced if 25.8 moles of potassium chlorate is heated? 2KCIO3) b) How many gram(s) of oxygen gas is produced...
6. Vinegar is 5.00% (m/v) acetic acid (CH3COOH). How many milliliters of vinegar would you need to react with an excess of baking soda (NaHCO3) in order to generate 10.0 L of carbon dioxide gas at 1.05 atm and a temperature of 25.0°C? 7. Shown below is the aqueous reaction of KNOX, HCl, and SnCl2. 2 KNO2 (aq) + 6 HCl(aq) + 2 SnCl2 (aq) → 2 SnCla (aq) + N20 (g) + 3 H20 (1) + 2 KCl (aq)...
1) One hundred (100) ml of a 1.00 M solution of HCl is diluted with water to prepare a 0.200 M solution. What is the volume of the resulting 0.200 M solution? Or asked another way, to what volume must the original solution be diluted? (3 points) 2) Lithium hydroxide, LiOH, is used in spacecraft to absorb the carbon dioxide exhaled by astronauts. Given 1.3 kg of LiOH, how many kg of CO2 can be absorbed? (10 Pts. The reaction...
Homework #7A Name: Due date: 3-16-20 1. How many moles of water, H20, contain 9.03 * 10molecules of water? 2. How many molecules are present in 4.9 moles of L,CO3. 3. How many moles of oxygen are present in 4.9 moles of L.COM 4. How many Li atoms are in 4.5 moles of Li? 5. Calculate the mass, in grams, for 3.75 10 molecules of C2Hs. 6. Calculate the mass, in grams, for 3.5 moles of CHO. 7. Calculate the...
CHEM 110 Online Lab Instructions for Exp 6 Molar Masses as Conversion Factors Part 1: The Chemical Reaction LET'S WATCH THE BALLOON INFLATE Let us do a simple "chemical reaction and see what happens when these two common household chemicals are put together: vinegar (HC,H,O2 -aqueous acetic acid solution) and baking soda (NaHCO, --sodium bicarbonate). Vinegar is a solution of acetic acid and water. Vinegar is used in salad dressings, to dye eggs, and in other cooking uses. Baking soda...
Pt.1 predict whether soluble or insoluble.
Pt 2. Miscible or immiscible
Pt 3 and beyond- answering questions
1. For each of the following pairs of solute and solvent, predict whether the solute would be soluble or insoluble. After making your predictions, you can check your answers by looking up the compounds in The Merck Index or the CRC Handbook of Chemistry and Physics. Generally, The Merck Index is the easier reference book to use. If the substance has a solubility...
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