Balancing Coefficients

In balancing chemical equations, we change

• Coefficients

• Subscripts

• Both can be changed

• None can be changed

Tags

NGSS.HS-PS1-7

What are the larger numbers that you CAN CHANGE in a chemical equation? 

• Coefficient 

• Products

• Reactants

• Subscripts

What is a coefficient?

• The small number on the right of the chemical symbol.

• The large number in front of a chemical formula.

• The number in between the chemical symbols.

• The number behind a chemical formula.

Tags

NGSS.MS-PS1-5

How many HCl molecules do you need to balance this equation? 
Mg +  __HCl --->  MgCl₂ + H₂

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

In a balanced chemical equation, if the coefficient of the reactant is increased, what must be done to balance the equation?

• Decrease the coefficients of the products.

• Increase the subscripts of the reactants.

• Adjust the coefficients of the products accordingly.

• Change the subscripts of the products.

Tags

NGSS.MS-PS1-5

The red numbers in the image below represent ________

• subscripts

• coefficients

• superscripts

• catalysts

Tags

NGSS.HS-PS1-7

What is the purpose of coefficients in a chemical equation?

• To indicate the physical states of the reactants and products

• To make the equation look more complex

• To balance the number of atoms of each element on both sides of the equation

• To show the speed of the reaction

Tags

NGSS.MS-PS1-5

What part of the chemical equation can change to help balance it?

• Subscript

• Superscript

• Coefficient

• Type of elements in the product(s)

• Type of elements in the reactant(s)

Tags

DOK Level 3: Strategic Thinking

Analyze and balance the following chemical equation: C_6H_{12}O_6 + O_2 \rightarrow CO_2 + H_2O. Explain the reasoning behind your steps.

Tags

DOK Level 4: Extended Thinking