1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
iris [78.8K]
3 years ago
15

Which molecule will form a solution with a very low pH? H3PO4 H2O NaOH KOH

Chemistry
2 answers:
Bond [772]3 years ago
6 0

Answer: Option (a) is the correct answer.

Explanation:

A solution which has more number of hydrogen ions will be acidic in nature and its pH will be less than 7. Whereas a solution which has more number of hydroxide ions will be basic in nature and thus, its pH will be greater than 7.

Also,        pH = -log \frac{1}{H^{+}}

Therefore, a low pH means pH will be very less than 7.

The given molecules will dissociate as follows.

      H_{3}PO_{4} \rightleftharpoons 3H^{+} + PO^{3-}_{4}

H_{2}O being a neutral molecule will not dissociate and pH of water is 7. Hence, it is a neutral molecule.

      NaOH \rightleftharpoons Na^{+} + OH^{-}

      KOH \rightleftharpoons K^{+} + OH^{-}

So, we can see that H_{3}PO_{4} gives maximum number of hydrogen ions. Therefore, we can conclude that molecule of H_{3}PO_{4} will form a solution with a very low pH.

Bess [88]3 years ago
4 0
The correct answer is A: H3PO4
You might be interested in
An atom gets over all positive charge by ____ _______
Rasek [7]
<h2>Answer:</h2>

Nucleus.

<h2>Explanation:</h2>
  • In an atom the nucleus has an overall positive charge as it contains the protons.
  • Every atom has no overall charge (neutral). While atoms do contain charged particles, they have the same number of positive protons as negative electrons( for example a sodium atom has 11 electrons which are of negative charge and 11 protons which are of positive charge).
  • These opposite charges cancel each other out making the atom neutral.

Result: Nucleus is the overall positive charge of an atom.

4 0
3 years ago
How do atoms combine to form all of the diverse types of matter in our universe? Pls, Help with a good valid answer and explanat
german
I don’t understand this
3 0
2 years ago
I need help on balacing equations
nevsk [136]

Answer: sorry hun can’t help with this I was asked different questions when I learned this :,)

Explanation: have a nice day

8 0
2 years ago
Which states of matter can form solutions?
IrinaVladis [17]

Answer:

c

Explanation:

spongebob cheese pants

8 0
2 years ago
Read 2 more answers
Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide: CaO (s) + H2O (l) → Ca(OH)2 (s) In a p
dybincka [34]

Answer:

The option closest to the percentage yield is option;

d. 81.1

Explanation:

The given chemical equation of the reaction is presented as follows;

CaO (s) + H₂O (l) → Ca(OH)₂

The mass of CaO in the experiment, m = 2.00 g

The volume of water with which the CaO was reacted = Excess volume of water

Number of moles = Mass/(Molar mass)

The mass of Ca(OH)₂ recovered, actual yield = 2.14 g

The molar mass of CaO = 56.0774 g/mol

The number of moles of CaO in the reaction, n₁ = 2.00 g/(56.0774 g/mol ≈ 0.036 moles

The molar mass of Ca(OH)₂ = 74.093 g/mol

The number of moles of Ca(OH)₂ in the reaction, n₂ = 2.14 g/(74.093 g/mol) ≈ 0.029 moles

From the given chemical reaction, one mole of CaO reacts with one mole of H₂O to produce one mole of Ca(OH)₂

Therefore, 0.036 moles of CaO will produce 0.036 moles of Ca(OH)₂

Mass = Number of moles × Molar mass

The mass of 0.036 moles of Ca(OH)₂ ≈ 0.036 moles × 74.093 g/mol = 2.667348 grams

∴ The theoretical yield of Ca(OH)₂ = 2.667348 grams

Percentage \ yield = \dfrac{Actual \ yield}{Theoretical \ yield}  \times 100 \%

The percentage yield = (2.14 g)/(2.667348 grams) × 100 = 80.23%

Therefore, the option which is closest is option d. 81.1.

5 0
3 years ago
Other questions:
  • Electronic configuration for Cr, Cu, Cr+2, Cu+2, Mn+2
    10·2 answers
  • What is R in the ideal gas law equation
    10·2 answers
  • 1.what happens when vinegar and baking soda are passed through lime water?
    15·1 answer
  • What occurs as energy is transferred through a wave?
    9·1 answer
  • calculate the mols of alt gas if the volume is 0.97 liters at a temperature of 12 C and the pressure is 152 Kpa’s
    11·1 answer
  • Compound A has a partition coefficient (K) of 7 when comparing its solubility in CH2Cl2 to water ( K=11, [solubility of A in g/m
    10·1 answer
  • A chemical process involves adding various agents to a vat and then waiting for the agents to react to make a final compound. Th
    6·1 answer
  • In chemical reactions, a product is _______.
    15·1 answer
  • Jim wants to react hydrogen and oxygen to get 36 grams of water. If he starts with 4 grams of Hydrogen (H), then how many grams
    15·2 answers
  • Moles to mass<br> HELP PLEASE <br> 15 pts
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!