Chemical Changes II

Which of the following word pairs correctly completes the sentence below?

_______ are corrosive substances characterised as having a sour taste, and a _______.

• Acids; pH less than 7

• Acids; pH greater than 7

• Bases; pH greater than 7

• Bases; pH less than 7

Which of the following statements is correct?

• Blue litmus paper turns red when placed in a base.
• Red litmus paper turns blue when placed in a base.
• Blue litmus paper stays blue when placed in an acid.
• Red litmus paper stays red when placed in a base.

Tags

NGSS.MS-PS1-2

If you neutralize an acid with a base what will be produced?

• Sugar and water
• Sugar and salt
• Salt and water
• Water

What are the products from the reaction of acid and carbonate?

• salt + water + hydrogen

• salt + water + carbon dioxide

• salt + water + ammonia

• salt + water

What are the products from the reaction of acid and metal?

• salt + hydrogen

• salt + water + carbon dioxide

• salt + water + ammonia

• salt + water

What are the products from the reaction of acid and base?

• salt + hydrogen

• salt + water + carbon dioxide

• salt + water + ammonia

• salt + water

What is the name of the salt formed between dilute hydrochloric acid and sodium hydroxide?

What is the name of the salt formed between dilute sulfuric acid and calcium carbonate?

What is the salt formed when zinc reacts with dilute nitric acid?

What is the name of the gas evolved when magnesium reacts with dilute hydrochloric acid?