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A 25 cm3 sample of an unknown concentration of sulfuric acid was titrated against 0.1 mol dm-3 sodium hydroxide. The average titre was 20 cm3. Calculate the concentration of the sulfuric acid.

Balanced equation: H2SO4 + 2NaOH → 2H2O + Na2SO4moles of NaOH = c x v = 0.1 mol dm-3 x (20/1000) dm3 = 0.002 molStoichiometry: ...

JK
Answered by Joseph K. Chemistry tutor
7432 Views

State and explain whether NaCl and Mg can conduct electricity in both the solid and molten states.

NaCl cannot conduct electricity in the solid state as the ions are held in an ionic lattice and therefore are not free to conduct. NaCl can conduct in the melt as the ions become mobile and therefore are ...

JK
Answered by Joseph K. Chemistry tutor
4054 Views

Where are chromosomes found? A.Cytoplasm B. Nucleus C. Ribosomes D. Vacuole

B. Nucleus

Answered by Biology tutor
1986 Views

What is a catalyst?

A substance which increases the rate of a reaction without being consumed

Answered by Biology tutor
1781 Views

How is division presented in the opening scene of King Lear

R.A Foakes has argued that 'King Lear' is a play about a 'divided kingdom'. Indeed, division is presented throughout the Jacobean Tragedy through the physical divide of pre-christian England and the crack...

HB
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