Homework Answers
Ca + 2 H2O - - - - > Ca(OH)2 + H2
Calcium in the aqueous solution of sodium chloride reacts with water molecules to form calcium hydroxide and hydrogen gas. the bubbles form due to formation of hydrogen gas.
this solution is basic in nature due to presence of calcium hydroxide which is a strong base. so it turns litmus blue.
it has nothing to do with the displacement of sodium in NaCl. calcium cannot displace sodium because calcium is less reactive than sodium.
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4. When Ca metal is placed in an aqueous solution of NaCl, the calcium slowly disappears...
Reactants Observation(s) Type of Reaction Balanced Molecular Equation aqueous barium chloride + aqueous sodium sulfate A...
Reactants Observation(s) Type of Reaction Balanced Molecular Equation aqueous barium chloride + aqueous sodium sulfate A white solid forms after the solutions are mixed together. Precipitation Reaction BaCl(aq) + Na SO.(aq) - BaSO (s) + 2 NaCl(aq) zinc metal + hydrochloric acid Bubbles are observed after the solutions are mixed together. The zinc appears to be smaller in size. aqueous sodium phosphate + aqueous copper(II) sulfate A solid forms after the solutions are mixed together. copper metal + aqueous silver...
1. A complex, [CuCl 5.0x10 forms when mixing aqueous solutions of CuCla and NaCl. The Kr...
1. A complex, [CuCl 5.0x10 forms when mixing aqueous solutions of CuCla and NaCl. The Kr for this reaction is a. Write the balanced equation for this equilibrium reaction. b. If Na:CO3 is added to the solution, a precipitate will form. Identify the precipitate. c. The Kap for this precipitate is 2.5x1010, What is the value of the equilibrium constant governing the equilibrium from part b? 2. For the following salt: KF a. Write the chemical equation for the anion...
Part A. pH estimation and explanation There are three methods to determine pH (Table 4). For...
Part A. pH estimation and explanation There are three methods to determine pH (Table 4). For litmus strips, red litmus paper turns blue in basic solution but stays red in acidic solution, while blue litmus paper turns red in acidic solution but stays blue in basic solutions. For the liquid universal indicator and pH 1-14 test papers, compare its color with the scale provided on the package to determine pH. When using litmus strips and pH 1-14 paper, use a...
Please I need help with number 54 and 61 please An aqueous NaCl solution is made...
Please I need help with number 54 and 61 please
An aqueous NaCl solution is made using 112 g of NaCl diluted to a total solution volume of 1.00 L. Calculate the molarity, molality, and mass percent of the solution. (Assume a density of 1 08 g/mL for the solution.) An aqueous KNO_3 solution is made using 72.5 g of KNO_3 diluted to a total solution volume of 2.00 L. Calculate the molarity, molality, and mass percent of the solution....
DETERMINATION OF A CHEMICAL FORMUL 4. If some of the calcium metal remains unreacted when you...
DETERMINATION OF A CHEMICAL FORMUL 4. If some of the calcium metal remains unreacted when you start the titration, the calcium will react with hydrochloric acid to produce hydrogen gas. CaloH)₂ + 2HCl cacla & H2O Ca (s) + 2 HCl(aq) +CaCl2 (aq) + H2 (8) Would this cause error in the titration? If so, would more or less HCl be required? How would this affect the molecular formula for calcium hydroxide? bicarbonate that must be used to neutralize the...
balance the equations please:). For the second picture, balance the circled ones! el 8t Reaction, record...
balance the equations please:). For the second picture, balance the
circled ones!
el 8t Reaction, record your observations, such as "black rm", "solution changes color", or "no change is evident", etc ed Equation, write a balanced equation for reactants and pro urs. (Metal ions that form have a charge of +2 except for silve n was evident, simply write "NR". ctive/Less Active Metal, write the symbol of the more active than" sign and the less active metal to the right...
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate t...
post lab questions?
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate the pH of this buffer solution if it has an equal concentration of NHs and NH4 b. Does this solution buffer in the acidic, basic, or nearly neutral pH range? Explain. c. Explain why it is necessary to provide a buffer solution at this point in the procedure. Solution IV Add 2 drops NH.CI solution and check the pH of the solution...
QUESTION 13 When 2 mL of 0.1 M aqueous HCI (hydrochloric acid) are added to a...
QUESTION 13 When 2 mL of 0.1 M aqueous HCI (hydrochloric acid) are added to a small strip of magnesium (Mg) what happens? A violent explosion O Nothing Bubbles of hydrogen are produced and the magnesium dissolves O The magnesium turns red and the solution goes yellow QUESTION 14 1 poi Which is the balanced chemical equation describing the reaction of question 13? O Mg(aq) + HCl(aq) → MgCl(s) + H(g) O Mg(s) + HCl(aq) - MgCl (aq) + H2(g)....
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water,...
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water, generating aqueous calcium chloride and liberating carbon dioxide gas. (You will need this for Part 1 of the experiment!) 2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started with 102.7 mg of calcium carbonate) in units of molar and millimolar. Also calculate the concentration in "parts-per-million as CaCO3". (Refer to section 13.5 of your textbook, if needed.)...
10) The product formed when an aqueous solution of Cation is added to a soap solution...
10) The product formed when an aqueous solution of Cation is added to a soap solution is: a) the Calcium Carboxylate precipitate b) CaCl2(s) c) the solid soap (precipitate). 11) The correct solubilities for the Na+1/K*l metal salts of RCO22, Arso31, and RSO4 +are: (S =soluble, 1 = Insoluble). a) RCO2-2 (S), ArsO3 (S), RSO4+ (S) b) RCO2-2 (S), ArS03-0), RSO41 (1) c) RCO2 2 (), ARSO3-?(), RSO4+ (1) d) RCO2 2 (O), ArS03-(S), RSO4* (S) 12) The correct solubilities...
Reactants Observation(s) Type of Reaction Balanced Molecular Equation aqueous barium chloride + aqueous sodium sulfate A white solid forms after the solutions are mixed together. Precipitation Reaction BaCl(aq) + Na SO.(aq) - BaSO (s) + 2 NaCl(aq) zinc metal + hydrochloric acid Bubbles are observed after the solutions are mixed together. The zinc appears to be smaller in size. aqueous sodium phosphate + aqueous copper(II) sulfate A solid forms after the solutions are mixed together. copper metal + aqueous silver...
1. A complex, [CuCl 5.0x10 forms when mixing aqueous solutions of CuCla and NaCl. The Kr for this reaction is a. Write the balanced equation for this equilibrium reaction. b. If Na:CO3 is added to the solution, a precipitate will form. Identify the precipitate. c. The Kap for this precipitate is 2.5x1010, What is the value of the equilibrium constant governing the equilibrium from part b? 2. For the following salt: KF a. Write the chemical equation for the anion...
Part A. pH estimation and explanation There are three methods to determine pH (Table 4). For litmus strips, red litmus paper turns blue in basic solution but stays red in acidic solution, while blue litmus paper turns red in acidic solution but stays blue in basic solutions. For the liquid universal indicator and pH 1-14 test papers, compare its color with the scale provided on the package to determine pH. When using litmus strips and pH 1-14 paper, use a...
Please I need help with number 54 and 61 please
An aqueous NaCl solution is made using 112 g of NaCl diluted to a total solution volume of 1.00 L. Calculate the molarity, molality, and mass percent of the solution. (Assume a density of 1 08 g/mL for the solution.) An aqueous KNO_3 solution is made using 72.5 g of KNO_3 diluted to a total solution volume of 2.00 L. Calculate the molarity, molality, and mass percent of the solution....
DETERMINATION OF A CHEMICAL FORMUL 4. If some of the calcium metal remains unreacted when you start the titration, the calcium will react with hydrochloric acid to produce hydrogen gas. CaloH)₂ + 2HCl cacla & H2O Ca (s) + 2 HCl(aq) +CaCl2 (aq) + H2 (8) Would this cause error in the titration? If so, would more or less HCl be required? How would this affect the molecular formula for calcium hydroxide? bicarbonate that must be used to neutralize the...
balance the equations please:). For the second picture, balance the
circled ones!
el 8t Reaction, record your observations, such as "black rm", "solution changes color", or "no change is evident", etc ed Equation, write a balanced equation for reactants and pro urs. (Metal ions that form have a charge of +2 except for silve n was evident, simply write "NR". ctive/Less Active Metal, write the symbol of the more active than" sign and the less active metal to the right...
post lab questions?
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate the pH of this buffer solution if it has an equal concentration of NHs and NH4 b. Does this solution buffer in the acidic, basic, or nearly neutral pH range? Explain. c. Explain why it is necessary to provide a buffer solution at this point in the procedure. Solution IV Add 2 drops NH.CI solution and check the pH of the solution...
QUESTION 13 When 2 mL of 0.1 M aqueous HCI (hydrochloric acid) are added to a small strip of magnesium (Mg) what happens? A violent explosion O Nothing Bubbles of hydrogen are produced and the magnesium dissolves O The magnesium turns red and the solution goes yellow QUESTION 14 1 poi Which is the balanced chemical equation describing the reaction of question 13? O Mg(aq) + HCl(aq) → MgCl(s) + H(g) O Mg(s) + HCl(aq) - MgCl (aq) + H2(g)....
1. Write the balanced equation for the reaction between calcium carbonate and hydrochloric acid in water, generating aqueous calcium chloride and liberating carbon dioxide gas. (You will need this for Part 1 of the experiment!) 2. Calculate the concentration of one liter of the resulting calcium chloride solution (assuming you started with 102.7 mg of calcium carbonate) in units of molar and millimolar. Also calculate the concentration in "parts-per-million as CaCO3". (Refer to section 13.5 of your textbook, if needed.)...
10) The product formed when an aqueous solution of Cation is added to a soap solution is: a) the Calcium Carboxylate precipitate b) CaCl2(s) c) the solid soap (precipitate). 11) The correct solubilities for the Na+1/K*l metal salts of RCO22, Arso31, and RSO4 +are: (S =soluble, 1 = Insoluble). a) RCO2-2 (S), ArsO3 (S), RSO4+ (S) b) RCO2-2 (S), ArS03-0), RSO41 (1) c) RCO2 2 (), ARSO3-?(), RSO4+ (1) d) RCO2 2 (O), ArS03-(S), RSO4* (S) 12) The correct solubilities...
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