Lets number the reaction as 0, 1, 2, 3 from top to bottom
required reaction should be written in terms of other reaction
This is Hess Law
required reaction can be written as:
reaction 0 = +1 * (reaction 1) -1 * (reaction 2) -1 * (reaction 3)
So, ΔHo rxn for required reaction will be:
ΔHo rxn = +1 * ΔHo rxn(reaction 1) -1 * ΔHo rxn(reaction 2) -1 * ΔHo rxn(reaction 3)
= +1 * (-186.0) -1 * (-65.1) -1 * (-12.6)
= -108.3 KJ
Answer: -108 KJ
Review Problem 6.084 Calcium hydroxide reacts with hydrochloric acid by the following equation: Ca(OH)2(aq)2HCI(aq)CaCl2(aq) +2H20() Calculate...
Calcium hydroxide reacts with hydrochloric acid by the following equation: Ca(OH)2(aq)+ 2Ha(aq) CaCl2(aq) + 2H20() Calculate AH in kilojoules for this reaction, using the following equations as needed. Cao(s) +2HCI(aq)CaCl2(aq) + H20(0 AHP-186 k Ca0(s)+ H20)Ca(OH)2(s) AH-65.1 k Ca(OH)2(s) Ca(OH)2(aq) AH 12.6 k) (dissolving in water) AH k) The number of significant digits is set to 3; the tolerance is +/-2 % Open Show Work Show Work is REQUIRED for this question:
Calcium reacts with water according to the chemical equation below: Ca + 2H20 --> Ca(OH)2 + H2 All but which reaction is expected to occur on the basis of the reaction of calcium and water? A. Ra + 2H20 --> Ra(OH)2 + H2 OB. Sr+ 2H20 --> SH(OH)2 + H2 OC. Al + 2H20 > A(OH)2 + H2 OD. Mg + 2H20 --> Mg(OH)2 + H2 O E. Be + 2H2O -> Be(OH)2 + H2
For the reaction 2HCl+Ca(OH)2⟶CaCl2+2H2O how many grams of calcium hydroxide, Ca(OH)2, are needed to react completely with 31.9 g of hydrochloric acid, HCl?
1. Consider the following equation: Ca(OH)2(s) + 2HCl(aq) + CaCl2(aq) + 2 H20(1).Solve the following questions based on the above questions, a. What type of chemical reaction is taking place? b. How many liters of 0.100 M HCI would be required to react completely with 5.00 grams of calcium hydroxide? (5 pts) Show the work. c. If I combined 15.0 grams of calcium hydroxide with 75,0 mL of 0.500 M HCI, how many grams of calcium chloride would be formed?...
2. (10 pts) Given the following data Ca(s)2C(graphite)CaC2(s) -62.8 kJ OH635.5 Ca(s)1/202(g) CaO(s) kJ CaO(s)H20()- Ca(OH)2(aq) OH 653.1 kJ 2CO2(g)H2O(l OH1300 C2H2(g)5/202(g) kJ C(graphite) O2(g)CO2(g) H= -393.5 kJ calculateH for the reaction (show your work for full credit) CaC2(s)+ 2H20()- Ca(OH)2(aq) CH2(g)
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO(s) + H20(1) – Ca(OH)2(s) In a particular experiment, a 4.50-g sample of Cao is reacted with excess water and 5.45 g of Ca(OH), is recovered. What is the percent yield in this experiment? 6.47 91.6 1.21 121
A dilute aqueous solution of calcium hydroxide at 25°C reacts with gaseous hydrogen chloride via the following reaction. 2HCI(g) + Ca(OH),lag, r=-) → Caci,lag, r= 0)+2H, 0(1) If the hydrogen chloride enters the reactor at 71.0°C, and the solution exits at 25°C, how much heat must be removed for every mole of CaCl2 produced? The heat of solution of Ca(OH)2 is -1008.2 kJ/mol, the heat of formation of Ca(OH)is-985.65 kJ/mol, the heat of solution of CaCl2 is -875.07 kJ/mol and...
Review Problem 6.085 Given the following thermochemical equations, COG) + Cl2(g)—COClz0) H,0() + COC126) + 2NaBr(s) — 2NaCIG) + Ca(OH)2C) + Brz(1) Ca(OH),() — COC) + H20() calculate the value of AH° (in kilojoules) for the reaction Cl:(8)+NaBr(s) — NaCl(s) + Brz() AH'= -110.9 kJ AH° = -60.2 kJ AH° = +65.1 kJ AH = The number of significant digits is set to 3; the tolerance is +/-2% Show Work is REQUIRED for this question: Open Show Work
8. Calcium carbide (CaC2) reacts with water to form acetylene (C2H2) and Ca(OH)2. From the following enthalpy of reaction data and the standard enthalpy changes listed, calculate the AHOc for CaC2(s). (2 points) CaC2(s) +2H20(1) -> Ca(OH)2(s) C2H2(g) AH.2 kJ AH kJ/mol) H2O(g) -241.82 H20(1) -285.83 Ca(OH)2(s)--986.2 C2H2(g) +226.77
Calcium carbonate (CaCO3) reacts with stomach acid (HCl, hydrochloric acid) according to the following equation: CaCO3(s)+2HCl(aq)⟶CO2(g)+H2O(l)+CaCl2(aq) Tums, an antacid, contains CaCO3. If Tums is added to 10.0 mL of a solution that is 0.400 M in HCl, how many grams of CO2 gas are produced?