How Much Sodium Bicitrate Is Required for a pH 5.42 Solution?

[jumbogala]

Homework Statement

What mass of sodium bicitrate would be needed to prepare a 1.00 L solution with a pH of 5.42?

Homework Equations

[H30+]=10^-pH

The Attempt at a Solution

First of all, I don't know what sodium bicitrate is, so I can't write the equation for it. What's bicitrate?

I wanted write the equilibrium expression for Ka. But I can only find the concentration of the [H30+] and not anything else... I have no idea how to do this question. Help please?

 

[Kushal]

if pH = 5.42, what is pOH equal to?

then [OH-] = 10^-pOH

 

[Blueshift5]

it is important to have a strong understanding of the concepts involved in a problem before attempting to solve it. In this case, it is necessary to first research and understand what sodium bicitrate is and what its chemical formula is. This will allow you to write the appropriate equation for its dissociation in water and determine its Ka value.

Once you have this information, you can use the equilibrium expression for Ka to solve for the concentration of [H30+] in the solution. From there, you can use the given pH value to calculate the concentration of [H30+] and then use the concentration and volume of the solution to determine the moles of [H30+] present.

Finally, you can use the molar mass of sodium bicitrate to calculate the mass needed to produce the desired concentration of [H30+]. It is important to double check your calculations and units to ensure accuracy in your answer. Overall, the key to solving this problem is having a strong understanding of the concepts and equations involved.