When both sodium and Hydrochloric acid are added to a test tube, what will be observed?
When a Metal and acid react together they form a salt, and hydrogen gas. You can't really see the salt when is is formed, as salts dissolve in solution. However you can see the hydrogen gas bubbles. So fizzing or effervescence would be an appropriate description.
Related Chemistry A Level answers
All answers ▸What causes a chemical reaction to happen?
Can you describe four variables which affect the rate of a chemical reaction and how they affect the rate?
Describe briefly the nature of metallic bonding and use this to explain why metals are malleable (can be hammered into shape) and conduct electricity
Explain the trend of first ionisation energy down a group.