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
What four properties do all waves have in common
Nina [5.8K]

The different types of motion

3 0
2 years ago
Read 2 more answers
A science student wants to use distillation to separate a mixture of two
statuscvo [17]

Answer:

Boiling point

Explanation:

Distillation is one of the most widely used separation technique in chemistry. It is used to separate a mixture of liquid substances with different boiling point. Hence, the basis of the separation is BOILING POINT DIFFERENCE.

In the procedure, the liquid substances are heated until they turn gaseous, which they do at different times considering their different boiling points. The separated components are then converted back to liquid states in a process called CONDENSATION.

6 0
3 years ago
How can you tell that diorite is an intrusive igneous rock?
VLD [36.1K]

Answer: if you examine the rock u might see that it has been in lava before or is dark from burns

Explanation: i dont know if im right but pls mark brainliest

6 0
2 years ago
How many liters of water can be made from 55 grams of oxygen gas and an excess of hydrogen at a pressure of 12.4 atm and a tempe
polet [3.4K]
First, we need the no.of moles of O2 = mass/molar mass of O2
                                                             = 55 g / 32 g/mol
                                                             = 1.72 mol
from the balanced equation of the reaction:
2H2 (g) + O2(g) → 2H2O(g)
we can see that the molar ratio between O2: H2O = 1: 2 
So we can get the no.of moles of H2O = 2 * moles of O2
                                                                  = 2 * 1.72 mol
                                                                  = 3.44 mol
So by substitution by this value in ideal gas formula:
PV = nRT

when P = 12.4 atm  & n H2O = 3.44 mol & R= 0.0821 & T = 85 + 273=358K

12.4 atm *V = 3.44 * 0.0821 * 358 = 8.15 L
 ∴ V ≈ 8.2 L 
4 0
3 years ago
jenny dissolves as much salt as she can in 100mL of room temperature water. she learned in class that less salt will dissolve in
Slav-nsk [51]

Answer:

if ice is added more salt can be dissolved ...........

5 0
3 years ago
Read 2 more answers
Other questions:
  • A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of sa
    6·1 answer
  • Which of the following is considered a strong acid HF, HClO4, H3PO4, or HC2H3O2
    7·1 answer
  • Radon-222 is a radioactive gas with a half-life of 3.82 days. How long would it take for fifteen-sixteenths of a sample of radon
    15·1 answer
  • My question is what is a cell?
    7·1 answer
  • What moon phases would this be and why?
    14·1 answer
  • You can open a can of soda at room temperature and hear a hiss which of the following factors has change inside the container
    12·2 answers
  • What is the empirical formula for a compound that is 29.44\% calcium, 23.55% sulfur, and 47.01% oxygen? This compound is a commo
    10·1 answer
  • What is the answer to N2+H2=NH3
    13·1 answer
  • 1. Which phase change is accompanied by the release of heat? A) H20(s)--> H2O(g) B) H20(l) ->H2O(s) C) H20(l)→ H2O(g) D) H
    12·1 answer
  • Which macro nutrient is made up of carbon and hydrogen elements join together in long groups called hydrocarbons?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!