Chemistry midterm review

Iron(II) oxide is shown in which of the following formulas?

• FeO

• FeO₂

• Fe₂O

• Fe₂O₃

Tags

NGSS.MS-PS1-1

The charge on the selenium ion when it combines with calcium to form CaSe is:

• 2-

• 1-

• 0

• 1+

• 2+

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Chlorate is a polyatomic ion. Which of the following best describes chlorate?

• when it forms an ion it has a charge of 2+

• it has 3 atoms of chlorine

• it has three atoms of oxygen

• it has a combining capacity of +1

A solution has a pH of 6.2, if its hydrogen ion concentration is increased by 1000 times, what would its new pH be?

• 4.2

• 8.2

• 9.2

• 3.2

A solution has a pH of 6.2, if its hydroxide ion concentration is increased by 1000 times, what would its new pH be?

• 4.2

• 8.2

• 9.2

• 3.2

How many atoms of oxygen are in the compound Cu(NO₃)₂?

• 1

• 3

• 5

• 6

• 2

Tags

NGSS.MS-PS1-1

What is the formula for ammonium phosphate?

• (NH₄)₃(PO₄)₃

• NH₄(PO₄)₃

• (NH₄)₃PO₄

• 3(NH₄)PO₄

Tags

NGSS.MS-PS1-1

A solution with a pH of 9 has a [OH⁻] concentration of

• 1.0 × 10⁻¹⁴ mol/L

• 1.0 × 10⁻⁹ mol/L

• 1.0 × 10⁻⁵ mol/L

• 1.0 × 10⁻⁷ mol/L

SnF₂ is added to toothpaste to help prevent cavities. What would be the written name of this ionic compound?

• tin fluorine(II)

• tin(II) fluorine(II)

• tin(IV) fluoride

• tin(II) fluoride

The formula for lead carbonate is Pb(CO₃)₂. Using Roman numerals, what is the correct way to name this compound?

• lead(IV) carbonate

• lead(IV) carbonate(II)

• lead(II) carbonate(II)

• lead carbonate