Chemical Reactions Recovery

Evidence of a chemical reactions is anything that shows - 

• a new substance has formed
• a solid dissolved in a liquid
• interaction between 2 gases
• a change in the state of matter

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following describes a precipitate?

• a liquid forms when a block of metal is heated
• a solid forms when one liquid is poured into another
• a gas forms when a solid is placed in a liquid
• bubbles form when an acid is poured on a rock

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is NOT an indication of a chemical change?

• temperature change
• formation of a precipitate
• shape change
• production of light

Tags

NGSS.MS-PS1-2

If an element is diatomic it should have a subscript of___

• 1, always

• 2, only when it is an element

• it shouldn't have a subscript, it should have a coefficent

• 2, when bonded in a compound

What is the charge of Iron in this compound. (Hint: think "uncross" method):

Fe₃(PO₄)₂

• 3+

• 2+

• 1+

• 6+

Fill in the blank. (Copper has a charge of 2+)

Cu+ AgNO₃ → Ag + _____

• Cu(NO₃)₂

• CuNO₃

• CuAg

• Cu

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

NGSS.HS-PS1-7

Predict the products of this synthesis reaction: H₂ + Cl₂ →

• HCl

• H₂Cl₂

• H₂Cl

• HCl₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

What type of reaction is this?

2 C₆H₁₄ + 19 O₂ → 12 CO₂ + 14 H₂O

• Single Replacement

• Double Replacement

• Combustion

• Decomposition

Predict the products for the this Single Replacement reaction:

K + HCl →

• KCl + H₂

• KHCl

• KH + Cl₂

• HCl + K₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Predict the products for the this Double Replacement reaction:

AgNO₃ + KCl →

• AgCl + KNO₃

• AgK + ClNO₃

• KAg + NO₃Cl

• AgCl + 3 KNO

Tags

NGSS.MS-PS1-1