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3 years ago

Circle the term or phrase in parentheses that makes each statement true.

Chemistry

2 answers:

Nataly_w [17]3 years ago

4 0

A substance that produces hydrogen ions is an acid

Tpy6a [65]3 years ago

3 0

Answer:

A substance that produces hydrogen ions in solution is AN ACID.

Explanation:

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ryzh [129]

Answer:

Explanation:

6. When insulating materials rub against each other, they may become electrically charged .

7. Charging by conduction involves the contact of a charged object to a neutral object.

8. Grounding is the process of removing the excess charge on an object by means of the transfer of electrons between it and another object of substantial size.

9. Grounding is the process of removing the excess charge on an object by means of the transfer of electrons between it and another object of substantial size.

6 0

2 years ago

Calcium hydroxide is a strong base but is not very soluble ( Ksp = 5.02 X 10-6 ). What is the pH of a saturated solution of Ca(O

Misha Larkins [42]

Answer : The pH of a saturated solution is, 12.33

Explanation : Given,

$K_{sp}$ = $5.02\times 10^{-6}$

First we have to calculate the solubility of $OH^-$ ion.

The balanced equilibrium reaction will be:

$Ca(OH)_2\rightleftharpoons Ca^{2+}+2OH^-$

Let the solubility will be, 's'.

The concentration of $Ca^{2+}$ ion = s

The concentration of $OH^-$ ion = 2s

The expression for solubility constant for this reaction will be,

$K_{sp}=[Ca^{2+}][OH^-]^2$

Let the solubility will be, 's'

$K_{sp}=(s)\times (2s)^2$

$K_{sp}=(4s)^3$

Now put the value of $K_[sp}$ in this expression, we get the solubility.

$5.02\times 10^{-6}=(4s)^3$

$s=1.079\times 10^{-2}M$

The concentration of $Ca^{2+}$ ion = s = $1.079\times 10^{-2}M$

The concentration of $OH^-$ ion = 2s = $2\times (1.079\times 10^{-2}M)=2.158\times 10^{-2}M$

First we have to calculate the pOH.

$pOH=-\log [OH^-]$

$pOH=-\log (2.158\times 10^{-2})$

$pOH=1.67$

Now we have to calculate the pH.

$pH+pOH=14\\\\pH=14-pOH\\\\pH=14-1.67=12.33$

Therefore, the pH of a saturated solution is, 12.33

7 0

3 years ago

Which of the following is NOT a property of an acid

ipn [44]

The answer is B. Acid turns blue litmus paper to red

4 0

3 years ago

What causes an earthquake?

ElenaW [278]

Answer:

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes seismic waves to be released, causing the ground to shake.

Earthquakes are caused by movement in the tectonic plates(known as plate tectonics).

This usually happens in plate boundaries(where one plate meets another), due to the pressure that builds up as the plates try to move, since tectonic plates are constantly moving

3 0

3 years ago

What is the momentum of a 37-kg person riding south on an 18-kg bicycle at 1.2 m/s?

guajiro [1.7K]

P = m*v

p = momentum
m = mass
v = velocity

p = (37 kg + 18 kg)*(1.2 m/s)

p = (55 kg)*(1.2 m/s)

p = 66 kg-m / s

5 0

3 years ago