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Chemistry
A Level

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
6385 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
3401 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
8209 Views

Can you explain Le Chatelier's Principle?

Le Chatelier's principle: If the external condition is changed, the equilibrium will shift to oppose this change. What are these external conditions that can be changed? Temperature, pressure and concentr...

Answered by Dominique N. Chemistry tutor
1804 Views

Draw and label a tetrahedral shape

4 bondsangles are 109.5 degrees

Answered by Mohammed Y. Chemistry tutor
1935 Views

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