This picture shows a sword. The sword is about 3400 years old. It is made of an alloy called bronze.
Bronze is made from copper and tin.
Bronze made better swords than pure copper. This is because bronze is harder than pure
copper
Explain why bronze is harder than pure copper.
Your answer should include details of
- how the atoms are arranged in pure copper and bronze
why pure copper is relatively soft
why bronze is harder.

Answer asap need to be answered by wednesday morning explain how a buffer works, using an ethanoic acid / sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.