chemistry

What mass of solid sodium formate (of MW
68.01) must be added to 115 mL of 0.57 mol/L
formic acid (HCOOH) to make a buffer solution
having a pH of 4.16? Ka = 0.00018 for
HCOOH.
Answer in units of g

  1. 👍
  2. 👎
  3. 👁
  1. millimols HCOOH = mL x M = approx 65 but you need to do all of these calculations more accurately.
    mmols HCOONa = base

    pH = pKa + log (base)/(acid)
    Substitute and solve for (base) in millimols.
    Change to mols, then g = mols x molar mass.
    You know mols and molar mass

    1. 👍
    2. 👎
  2. whats the answer?

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Write the balanced chemical equation for each of these reactions. Include phases. When aqueous sodium hydroxide is added to a solution containing lead(II) nitrate, a solid precipitate forms. However, when additional aqueous

  2. Chemistry

    Calculate the pH that results when the following solutions are mixed 1. 35 mL of 0.20 M formic acid 𝐻𝐢𝑂𝑂𝐻, πΎπ‘Ž = 1.77 Γ— 10βˆ’4 2. 55 mL of 0.10 M sodium formate π»πΆπ‘‚π‘‚π‘π‘Ž 3. 110 mL of water

  3. chem

    A 4.55L sample of water contains .115g of sodium ions. Determine the concentration of sodium ions in ppm if the density of the solutions is 1.00g/mL. Ok so ppm=mass of solute/mass of solution *10^-6 so we have the mass of the

  4. Chemistry

    Write the balanced chemical equation for each of these reactions. Include phases. When aqueous sodium hydroxide is added to a solution containing lead(II) nitrate, a solid precipitate forms. However, when additional aqueous

  1. Chemistry

    13. Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. How many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? 2Na + 2H2O = 2NaOH + H2 So far I have this

  2. Chemistry

    Select the true statements regarding the resonance structures of formate. HCO2 Check all that apply: Each oxygen atom has a double bond 50% of the time. The actual structure of formate is an average of the two resonance forms.

  3. Organic Chemistry

    What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution? I know that it is this equation but I wanted to know what is the name of the white solid: HOC6H4COOCH3 + NaOH β€žΒ³

  4. Chemistry

    Identify the salt that is produced from the acid-base neutralization reaction be- tween sodium hydroxide and hydrocyanic acid (HCN). 1. sodium cyanide 2. sodium acetate 3. sodium amide 4. sodium formate

  1. Chemistry

    Write the following into a balanced equation. a) When a mixture of copper (II) oxide and carbon is heated, elemental copper forms and carbon monoxide evolves into the atmosphere. b) When a concentrated solution of sodium hydroxide

  2. chemistry

    In the reaction between formic acid (HCHO2) and sodium hydroxide, water and sodium formate (NaCHO2) are formed. To determine the heat of reaction, 75.0 mL of 1.07 M HCHO2 was placed in a coffee cup calorimeter at a temperature of

  3. Chemisty

    how many grams of oxygen gas will be required to react completely with 92.0 grams of solid sodium to form solid sodium oxide?

  4. Chemistry

    The pK3 of formic acid is 3.75 A)what is the pH of a buffer in which formic acid and sodium formate have equimolar concentration? B)what is the pH of a solution in which the sodium formate is 10M and the formic acid is 1M?

You can view more similar questions or ask a new question.