chemistry practical

Question 1

acid + metal=

Answer 1

salt+hydrogen gas(h2)

Question 2

acid + metal carbonate=

Answer 2

salt + carbon dioxide + water

Question 3

law of conservation of mass states

Answer 3

The law of conservation of mass states that matter cannot be created or destroyed only rearranged

Question 4

acid + base =

Answer 4

salt + water

Question 5

what is needed in a practical write up

Answer 5

title,aim,hypothesis,equipment,diagram(can be used in method, method,risk assessment, results, discussion/observations,conclusion

Question 6

what do you need to do for graphs?

Answer 6

Use pencil and ruler, include tite independent variable on x axis and dependent variable on y axis with units,scale-even,easy,enormous,plot points based off results and draw line or curve of best fit depending on which will show trend of graph better

Question 7

which one is the independent variable and which is the dependent variable?

Answer 7

The independent variable is what is being changed and goes on the x-axis while the dependent variable is the result of the change or what is being measured and goes on the y axis.

Question 8

what is decomposition?

Answer 8

The process of simplifying a chemical into two or more separate substances.

Question 9

what are the types of decomposition?

Answer 9

Thermal,photolysis,electrolysis

Question 10

How would you answer an application or analysis question?

Answer 10

Read the question carefully, look at how many marks it’s worth to get an idea of the criteria and refer to any graphs,diagrams,tables,flow charts etc in your response.

Question 11

what are the melting and boiling points?

Answer 11

Melting point is when a solid become a liquid and boiling point is when a liquid becomes a gas.