Edpuzzle- Intro to Double Displacement

What is the first step in predicting products of double replacement reactions?

• Combine the outer elements first.

• Balance the equation.

• Identify the charges.

• Combine the inner elements first.

In a double replacement reaction, which element's charge does not change?

• Neither charge changes.

• Metal

• Nonmetal

• Both charges change.

What happens to the subscript from the reactants in the product prediction?

• It is always included.

• It is included only if charges are balanced.

• It is never included.

• It is included only if charges are unbalanced.

Why is it important to know the typical charges of elements in predicting products?

• To identify reactive elements.

• To balance the equation.

• To predict the state of matter.

• To determine the correct subscripts.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why is it unnecessary to add additional subscripts when the charges are the same?

• Because the elements are inert.

• Because the reaction does not proceed.

• Because the charges are already balanced.

• Because it simplifies the equation.

How do you predict the product when combining aluminum and phosphate?

• By adding subscripts to balance charges.

• By changing the charges of the elements.

• By keeping the charges the same.

• By removing all subscripts.

Tags

NGSS.HS-PS1-1

What must be done when the charges of combining elements are not the same?

• Ignore the charges.

• Use a subscript to balance the charges.

• Change the element's charge.

• No action is needed.

What is the role of subscripts in the products of a chemical reaction?

• To represent isotopes.

• To show the number of molecules.

• To balance the overall charge.

• To indicate the phase of the element.

How do you approach predicting products in a complex reaction?

• By using the same method as simpler reactions.

• By balancing the equation first.

• By changing the charges of elements.

• By combining elements based on their position.

Tags

NGSS.HS-PS1-1

What determines the subscript in the product of a reaction?

• The periodic group of the elements.

• The molecular weight of the elements.

• The original subscript of the elements.

• The charge of the opposite element.