Given the following data: Conc. (M) Volume (mL) Tinitial (°C) Tfinal (°C) Solution NaOH 0.750 50.00 19.84 23.18 HCI 0.500 50.00 19.84 Calculate AH° for the reaction: HCl(aq) + NaOH(aq) H2O(1) + NaCl(aq) You may assume all solutions to have the same density and specific heat as water (1.00 g/mL and 4.184 J/g°C) kJ/mol

Given the following data: Conc. (M) Volume (mL) Tinitial (°C) Tfinal (°C) Solution NaOH 0.750 50.00 19.84 23.18 HCI 0.500 50.00 19.84 Calculate AH° for the reaction: HCl(aq) + NaOH(aq) H2O(1) + NaCl(aq) You may assume all solutions to have the same density and specific heat as water (1.00 g/mL and 4.184 J/g°C) kJ/mol

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter16: Solutions

Section: Chapter Questions

Problem 100E: Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a...

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Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the formula KHC8H4O4. This is often written in the short-hand notation as KHP. If 25.0mL of a potassium hydroxide solution are needed to neutralize 2.26g of KHP, what is the molarity of the potassium hydroxide solution? Potassium hydrogen phthalate sometimes called potassium biphthalate, as shown on this bottle is an acid that is convenient to store and use because it is a solid.
Consider the reaction at 25 degrees celsius 2NO3-(aq)+8H^+(aq)+3Cu(s)=3Cu2+(aq)+2NO(g)+4H2O(l) At what pH is the reaction at equilibrium with all other ionic species at 0.01M and gases at 1 atm?
The dissociation of the weak acid acetic acid (CH3COOH) is represented by the equation below. Enter the equation including all formatting and physical states in the answer blank. CH,COOH(ag) + H,0() – H,0*(aq) +CH,Coo"(aq) x | x. Me -. 8. (agi.
In a solution of 0.015 mol L HBr(aq) at 25 °C (a) What are the concentrations of the hydronium, H,O', and hydroxide, OH, lons? [H,O") = Number mol L1 [OH] = Number mol L-1 * Recall that HBr is a strong acid which means it completely lonizes in water * Syntax for scientific notation is 1.23 x 10 is 1.23E4 and 1.23 x 10 is 1.23E-4 (b) What is the pH of the solution? Number * Note that all logarithms have two parts. The decimal part is called the mantissa. The digits in the mantissa are the only significant figures in a logarithm. The integer, or characteristic, is the power to which the base is raised when writing the number in scientific notation It is an exponent and therefore not a significant figure. Section Attempt 1 of 1 Verify
Using the following equations, determine (a) Equilibrium expressions, K, and K2; (b) The equation for the reactions that the sum of the two equations; (c) The equilibrium expression, K3, for the sum of the two equations 1. CO33 (aq) + H*(aq) 2HCO;"(aq) 2. HCO, (aq) + H*(aq) H,CO;(aq) K¡ = ? K3 = ?
Consider the following chemical equilibrium for the weak acid HF in water: HF(g) + H_2O(l) \rightleftharpoons F^-(aq) + H_3O^+(aq). Which of the following statements is correct when water is evaporated from to the system?
HF(g) + H,O(1) H,0*(aq)+ F"(aq) K = 1.1 x 10-3 F (aq) + HF(g) HF;(ag) K= 2.6 x 10- a. Is fluoride in pH 7.00 drinking water more likely to be present as F"(aq) or HF2 (aq)? O HF2 (aq) O F(aq) b. What is the equilibrium constant for this equilibrium? Number 2 HF(g) + H,0(1) H,0*(aq) + HF, (aq) c. What are the pH and equilibrium concentration of HF2" in a 0.150 M solution of HF? (HF, - Number Number pH = M Check Answer View Solution
10. If 29.50 mL of 0.175 M nitrous acid neutralizes 50.0 ml. of harium hydroxide, what is the molarity of the base? 2HNO;(aq) + Ba(OH);(aq) Ba(NO:)(aq) + 2H;O(1)
Consider the following aqueous chemical equilibrium of benzoic acid, a weak acid: C6H5COOH(aq) + H2O(l) is in equilibrium with H3O+(aq) + C6H5COO-(aq) a. The addition of H3O+(aq) to the chemical equilibrium will have what effect on the amount (moles) of C6H5COO-(aq) in the system? b. Addition of OH-(aq) to the chemical equilibrium will have what effect on the amount (moles) of C6H5COOH(aq) in the system? c. Removal of C6H5COO-(aq) from the chemical equilibrium will have what effect on the amount of (moles) H3O+(aq) in the system? d. Increasing the pH of the solution will have what effect on the amount (moles) of C6H5COOH(aq) in the system?
Tamples of NaP (a) and NIL,CI () re dissolved n separate beakers that each contan 100 ml.of water One of the salts produces a slghtly ackde sotion which of the fulowing quatens best represents the formation of the slightly acide solution Na' (ag) + 21,0() NaOH (ag) + H,0 (ag) F (ag) + H,O()HP(ag) +OH (ag) c) NH, (ag) + H,0 ()= NH, (ag) + H,0" (ag) CI (ag) + H,0() HC(og) + OH (ag)
app.101edu.cо Question 14 of 15 Submit A solution of phosphoric acid (HPO,) with a known concentration of 0.250 M HAPPO is titrated with a 0.800 | M NaOH solution. How many mL of NaOH are required to reach the third equivalence point with a starting volume of 72.0 mL H,PO, according to the following balanced chemical equation: НРО, + 3 NaOH -> NA PO, + 3 Н.о 4 STARTING AMOUNT ADD FACTOR ANSWER RESET *( ) 0.800 6.75 x 104 2 1 0.250 0.0675 22.5 1000 3 67.5 7.50 72.0 0.001 43.2 L HAPPO mol NaOH М НАРРО g NaOH L NaOH mL H,PO, mL NaOH M NaOH g H PO mol HPO, +
Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous solution. If neutral, simply write only NR. KC3H;O3 O4- 3- O2+ 3+ D 4+ 1 2 3 4 6. 7 8 9 1 3 4 6. 7 (s) (1) (g) ||(aq) + NR OH C H H30* H20 K Reset • x H20 Delete 1L LO 2. 2.