Lab Quiz: Chemistry - Requires Respondus LockDown Browser + Webcam

When potassium becomes an ion, it will develop what charge? Indicate the full charge.

+1

Which is more acidic?

0.002 hydrogen ions /deciliter of solution

What is the normal pH range for the stomach?

1-2

A pH of 9 is how many times more basic than a pH of 6?

1000

A pH of 4 is how many times more acidic than a pH of 8?

10000

If ion X has 3+ charge and it has 20 protons, how many electrons would it have?

17

How many protons does calcium have?

20

How many electrons does beryllium have?

4

Pretend atom X has a half-life of 6 days. If we began with 80 mCi of atom X, how much will be leftover in 24 days?

5

What is the normal pH range for the blood?

7.35 - 7.45

What is the chemical symbol for the ammonium ion?

NH4+

Iodine-131 and iodine-124 have a different mass. What makes them have a different mass?

The number of neutrons

An increase in hydrogen ions will cause the pH of a solution to ____________.

go down

if a solution is becoming more basic, is the pH going up or going down?

going up

The bond between the hydrogen of one water molecule and the oxygen of a different molecule is called a(n) ____________.

hydrogen bond

If a molecule is polar then it is also ____________.

hydrophilic

Cations binding to anions, form what type of bond?

ionic

What is the latin name for sodium?

natrium

What type of bond exists when electrons are shared equally between two atoms?

nonpolar covalent bond

Name this polyatomic ion: PO43-

phosphate