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pH and Kw question: A student dissolves 1.75g of a drain cleaner (based on NaOH) in water and makes the solution up to 100cm3. The student measures the solution pH as 13.60. Determine the percentage of NaOH in the drain cleaner, in terms of mass (g).

[H+] = 10-pH, so [H+] = 10-13.6

Answered by Laura N. Chemistry tutor
6052 Views

Give the IUPAC name for the following molecule and draw its displayed formula: CH3(CH2)3COOH

IUPAC name stem comes from the longest chain of carbon atoms, in this case five atoms giving pentan-, and the suffix comes from the most important functional group in the molecule, in this case the carbox...

Answered by Lewis K. Chemistry tutor
3187 Views

Sodium hydroxide reacts with phosphoric(V) acid according to the equation: 3NaOH + H3PO4 -> Na3PO4 + 3H2O 25.00 cm3 of 0.10 mol dm-3 sodium hydroxide reacts with 0.05 mol dm-3 H3PO4. The volume of H3PO4, in cm3, required for neutralisation is?

This is a simple moles equation and the method with any moles equation is find the number of moles of something, use the chemical equation to work out the number of moles of the thing you need to find and...

Answered by Matthew E. Chemistry tutor
11876 Views

What is the acid dissociation constant, Ka of the 0.150 mol dm–3 solution of weak acid HA with pH of 2.34?

First, It would be useful to write the equation for the dissociation of the weak acid HA, which is HA <--> H++ A-. Then, write the Ka expression of the weak acid HA, which is [...

Answered by Venus S. Chemistry tutor
7407 Views

Explain in terms of structure why giant ionic lattices have high melting and boiling points. [4]

Giant ionic lattices are regular structures, held together by ionic bonds. These ionic bonds are strong electrostatic forces of attraction between oppositely charged ions, acting in all directions. Energy...

Answered by Ruth N. Chemistry tutor
16110 Views

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