chemistry

posted by .

please help solve this problem now. I really need an answer. thank you

When one mole of KOH is neutralized by sulfuric acid, q=-56kJ. At 22.8 C , 25.0 mL of 0.500 M H2SO4 is neutralized by 50.0 mL of 0.500 M KOH in a coffee-cup calorimeter. What is the final temperature of the solution?

  • chemistry -

    2KOH + H2SO4 ==> H2SO4 + 2H2O
    q = -56 kJ/mol KOH or 2-56 = -112 kJ/rxn.
    50.0 mL x 0.500M KOH = 25 mmols.
    25.0 mL x 0.500M H2SO4 = 12.5 mmols.
    Total volume = 75 mL and I assume density is considered to be 1.00 g/mL.
    q = mass H2O x specific heat H2O x (Tfinal-Tinitial)
    112 = 75g x 4.184 J/g*K x (Tfinal-22.8)
    Solve for Tf
    I get an estimate of 23+ C

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    If an aqueous solution of sulfuric acid (H2SO4) is neutralized by 3.20 mol of sodium hydroxide (NaOH), how many moles of acid were originally present in the solution?
  2. Chemistry

    A volume of 60.0 of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 25.2 mL of 1.50M H2SO4 was needed?
  3. Chemistry

    But in the answer options: a) -27.4 kJ b) -72.8 kJ c) -78.4 kJ d) -84.6kJ I attempted this problem in the other way.When using the q =mcdT,I added the mass of both water and sulfuric acid. q = (300g +10.65g)(4.184J/g.K)(6.55C) = 8513.43 …
  4. ap chemistry

    A 37 mL sample of a solution of sulfuric acid is neutralized by 42 mL of a 0.113 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L
  5. Chemistry

    In an acid base titration 32.5 mL of sodium hydroxide, NaOH, were neutralized by 17.6 mL of 0.180 mol/L sulfuric acid, H2SO4. Calculate the concentration of the sodium hydroxide.
  6. Chemistry

    A 10.0mL sample of H2SO4 was neutralized by 13.5mL of 1.0M KOH. What was its molarity of H2SO4?
  7. Chemistry

    25cm^3 H2SO4 is neutralized by 40 cm^3 of 0.03 mol/dm^3 KOH. What is the molar concentration of H2SO4?
  8. Chemistry

    A 69 mL sample of a solution of sulfuric acid is neutralized by 41 mL of a .161 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L.
  9. Science

    what is the concentration of sulfuric acid if 0.25l of it is neutralized by 0.56l of 0.030m koh?
  10. Chemistry

    Given the balanced neutralization equation: H2SO4+2KOH→K2SO4+2H2O How many moles of potassium hydroxide (KOH) are required to neutralize 4.5 mol of sulfuric acid (H2SO4)?

More Similar Questions