Calculate ∆H and ∆U for the reaction 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) + H2(g) Assume standard state conditions (T = 25◦C, p = 1 atm) and ideal gas behavior. Why do ∆H and ∆U differ? (Hint: In this case, ∆H is ∆Hrxn.)
Calculate ∆H and ∆U for the reaction 2 Na(s) + 2 H2O(l) → 2 NaOH(aq) +...
5. Consider the following redox molecular reaction: Na(s) + H2O(l) ? NaOH(aq) + H2(g) If water is written as HOH(), then the equation is Na(s) + HOH(l) ? NaOH(aq) + H2(g) Write the following reactions: Oxidation reaction: Reduction reaction: Balanced net ionic reaction: Reducing agent: Oxidizing agent:
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 475 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
Given: 1) NaOH Na+(aq) + OH- (aq) 2) NaOH + H+ Cl-(aq) H2O(l) + Na+(aq) + Cl-(aq) 3) Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) H2O(l) + Na+(aq) + Cl-(aq) Show that equations 1 and 3 can be added algebraically to give equation 2. We were unable to transcribe this imageWe were unable to transcribe this imageWe were unable to transcribe this image
Sodium reacts violently with water according to the equation: 2 Na(s) + 2 H2O(l) +2 NaOH(aq) + H2(g) The resulting solution has a higher temperature than the water prior to the addition of sodium. What are the signs of AH° and Asº for this reaction? AH° 0 and AS™ > 0 AH° >0 and AS® < 0 AH° <0 and AS™ > AH° < and AS® < 0
15. Determine the net ionic equation for the following chemical reaction: NaOH(aq) + HCl(aq) ----------> NaCl(aq) + H20 hint: NaOH(aq) is strong base HCl(aq) is a strong acid OH-(aq) + H+ (aq) ----> H2O(1) 20H-(aq) + 2C1-(aq) -----> H2O(l) + C12(8) NaOH(aq) + CIO-(aq) -----> C12(g) + O2(g) + H2(g) + Na(s) H+(aq) + NaOH(aq)- H2O(1)+ Na(s) 13. A compound contains 20.24% Al and 79.76% Cl. Calculate the empirical formula. molar masses: Al = 26.98 g/mole and Cl = 35.45...
Sodium reacts with water according to the reaction: 2Na(s)+2H2O(l)→2NaOH(aq)+H2(g) Identify the oxidizing agent. a) H2O(l) b) NaOH(aq) c) Na(s) d) H2 (g)
NaOH(s) +H*(aq) + Cl(aq) → H2O(1) + Na*(aq) + Cl(aq) a. Determine the literature enthalpy of reaction (AH,xn) based on the tables found in Appendix J of your book.
1- For the following reaction, Na+(aq) + OH-(aq) + H+(aq) + Cl- (aq) à Na+(aq) + Cl- (aq) + H2O (l) Na+(aq) + Cl- (aq), ions not involved in the reaction, are called _________________ions. 2- For the following reaction, Na+(aq) + OH-(aq) + H+(aq) + Cl- (aq) à Na+(aq) + Cl- (aq) + H2O (l) What type of reaction is taking place? ____________________ 3- What is the mass in grams of 1.73 mol of MgBr2? __________ 4- What is the percentage composition...
Reversible reaction to consider: CO2(g) + H2O(l) + Na+(aq)+Cl-(aq)= HCO3(aq) +H+(aq)+Cl-(aq) Note: This reaction models atmospheric CO2 which dissolves in the ocean in a reversible reaction. Answer the following questions: 1. From an equilibrium perspective, what happens to the pH of the ocean when the concentration of CO2 in the atmosphere increases? 2. What affect on equilibrium would occur if some Na is removed from the reaction? 3. If the pH of the ocean was lowered by adding a large quantity...
For the following chemical reaction HClO4(aq)+ NaOH(aq) H2O(l) + NaClO4(aq) write the net ionic equation, including the phases. Which of these ions are considered ''spectator ions'' for this reaction? Check all that apply. H+ Na+ ClO4- OH-