Thermal Stability of Group 1 Nitrates and Carbonates

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Why is magnesium hydroxide used in medicine as an antacid?

Because it is alkaline and can neutralize acids (correct)

Because it is the most soluble Group 2 hydroxide

Because it reacts with acids to form a white precipitate

Because it is the least soluble Group 2 hydroxide

Which Group 2 sulfate is the least soluble?

Magnesium sulfate (MgSO4)

Barium sulfate (BaSO4) (correct)

Strontium sulfate (SrSO4)

Calcium sulfate (CaSO4)

How are barium meals useful in medical imaging?

They allow imaging of internal tissues and organs (correct)

They form a white precipitate when present in the blood

They neutralize acidic stomach contents

They introduce barium ions into the blood for better imaging

What is the significance of barium sulfate being insoluble in medicine?

It allows safe use as a medical tracer Signup and view all the answers

Which Group 1 carbonate is the least soluble?

Lithium carbonate (Li2CO3) Signup and view all the answers

Which type of gases are produced when Group 2 carbonates undergo thermal decomposition?

Carbon dioxide Signup and view all the answers

Why is barium chloride used as a test for sulfate ions?

Because it reacts with sulfate ions to form a white precipitate Signup and view all the answers

What is the general condition under which Group 1 and Group 2 metals undergo thermal decomposition?

Aerobic conditions Signup and view all the answers

Why does more heat tend to be required for the thermal decomposition of Group 2 carbonates as you go down the group?

The ions increase in size Signup and view all the answers

What type of gases are produced when Group 2 nitrates undergo thermal decomposition?

Nitrogen dioxide and oxygen Signup and view all the answers

Which of the following statements about Group 1 metals is true based on the text?

Group 1 metals generally never fully complete their reactions. Signup and view all the answers

What differentiates the thermal decomposition of Group 1 nitrates from Group 2 nitrates?

The types of gases produced Signup and view all the answers

Why do the remaining Group 1 nitrates produce a metal nitrite and oxygen upon heating?

They decompose at high temperatures Signup and view all the answers

What happens when Group 1 carbonates are heated in a lab?

They require extremely high temperatures to decompose Signup and view all the answers

Why do smaller ions form less stable carbonates and nitrates?

They have higher charge density Signup and view all the answers

What trend is observed in the stability of carbonates and nitrates as you go down Groups 1 and 2?

More stable as you go down the group Signup and view all the answers

How can Group 1 and Group 2 elements be identified using flame tests?

By observing the color of the flame produced Signup and view all the answers

What is the purpose of cleaning a nichrome wire in concentrated hydrochloric acid before performing a flame test?

To remove impurities from the wire Signup and view all the answers