6.2

List the steps of the scientific method

d

e

f

c

b

a

Ask a question

Conduct experiment

Form a hypothesis

Draw conclusions

Communicate results

Analyze results

Which letter represents amplitude? (a)  

• A

• B

• C

• D

• E

Tags

NGSS.MS-PS4-1

The reaction between an acid and an alkali

produces salt and water. This reaction is called

• acidication

• neutralisation

• alkalisation

Tags

NGSS.MS-PS1-5

Hydrochloric acid reacts with Sodium hydroxide and forms water and

• sodium Hydrokside

• sodium chloride

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Complete the word equation below:

Acid + alkali --> ............... + water

• water

• salt

• gold

• metal

Toothpaste contain .................. that neutralize acid formed by bacteria.

• alkali

• acid

• antacid

• slaked lime

What method is used to study the neutralisation reaction between an acid and an alkali?

• Evaporation

• Titration

• Sublimation

• Electrolisis

In a neutralisation reaction, what is the function of the indicator?

• To indicate that the mixture is neutral

• To indicate that hot water should be added

• To indicate that the flask should be shaken

• To indicate that a precipitate is formed

In a neutralisation reaction, dilute hydrochloric acid is slowly added to a sodium hydroxide solution. What is the colour change at the end point if the indicator used is phenolphthalein?

• From colourless to pink

• From blue to green

• From pink to colourless

• From green to blue

products of a neutralisation reaction are always

• an acid and a base

• an acid and a salt

• salt and water

• salt and base