College-Chemistry

NaOH(s)+ H2SO4(aq)=Na2SO4(aq) + H2O(l)

Consider the unbalanced equation above.A 0.900 g sample of impure NaOH was dissolved in water and required 37.0 mL of 0.145 M H2SO4 solution to react with the NaOH in the sample. What was the mass percent of NaOH in the sample?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. Balance the equation.
    2NaOH + H2SO4 ==> Na2SO4 + 2H2O

    moles H2SO4 = M x L = 0.145 x 0.037 = 0.005365
    Now look at the equation. There are two moles NaOH for each mole H2SO4; therefore, moles NaOH titrated = 2 x 0.005365 = 0.01073

    grams NaOH = moles x molar mass = 0.01073 x 40 (approximately--you use the more exact number) = 0.4292

    %NaOH = (grams NaOH/mass sample)*100 = ??, then round to 3 significant figures.
    Check my math.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. How do you get the mass of the entire sample?

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    When 25.0 mL of 1.0 M H2SO4 is added to 50.0 mL of 1.0 M NaOH at 25.0 °C in a calorimeter, the temperature of the aqueous solution increases to 33.9 °C. Assuming the specific heat of the solution is 4.18 J/(g·°C), that its

  2. chemistry

    A 43 mL sample of a solution of sulfuric acid is neutralized by 24 mL of a 0.053 M sodium hydroxide solution. Calculate the molarity of the sulfuric acid solution. Answer in units of mol/L. Here is my work so far. I thought I have

  3. chemistry

    A 25.0-mL sample of H2SO4 is neutralized with NaOH. What is the concentration of the H2SO4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid?

  4. chemistry

    A 0.205 g sample of impure NaOH requires 17.5 mL of 0.2180 M HCl for neutralization. What is the percent of NaOH in the sample, by weight?

  1. Inorganic and Organic Chemistry

    When solutions of H2SO4 and NaOH react, the balanced molecular equation is: H2SO4 (aq) + 2 NaOH(aq) Na2SO4(aq) + 2 H2O (I) How much Na2SO4 is obtained when 4.00 g of H2SO4 reacts with 4.00 g of NaOH?

  2. Chemistry help

    NaOH+H2SO4-> H2o+Na2SO4? How many moles of NaOH required to neutralize 1 mole H2SO4?

  3. Chem

    Which of the following is not an example of a neutralization reaction? A HCl + NaOH NaCl +H2O B 2 NaOH + H2CO3 Na2CO3 +2 H2O C H2SO4 + 2 NH4OH (NH4)2SO4 + 2 H2O D 2 AgNO3 + Zn 2Ag +Zn(NO3)2 A?

  4. chem

    An impure sample of (COOH)2 ·2 H2O that has a mass of 3.4 g was dissolved in water and titrated with standard NaOH solution. The titration required 42.7 mL of 0.156 molar NaOH solution. Calculate the percent (COOH)2 · 2 H2O in

  1. LCM

    H2SO4+NAOH=NA2SO4+H2O

  2. chemistry

    H2SO4(aq) + NaOH(aq)-> Na2SO4(aq) + H2O(l) Consider the unbalanced equation above. What is the concentration of the original sulfuric acid solution if 60.5 mL of the acid reacts with 18.0 mL of 0.110 M sodium hydroxide?

  3. acid and base titrations

    Which of the following solutions should be used when titrating a 25.00mL sample of CH3COOH that is approximately 0.1 M? a.) 0.150 M NaOH b.) 0.001 M NaOH c.) 3.00 M NaOH d.) 6.00 M NaOH

  4. Chemistry

    What is the net ionic equation when H2SO4 is neutralized by NaOH in aqueous solution? Write the molecular equation. H2SO4 + 2NaOH ==> Na2SO4 + 2H2O Convert to ions. 2H^+ + SO4^= + 2Na^+ + 2 OH^- ==> 2Na^+ + SO4^= + 2H2O Now cancel

View more similar questions or ask a new question.