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4vir4ik [10]
2 years ago
9

Which indicator is blue in a solution that has a pH of 5.6?

Chemistry
2 answers:
m_a_m_a [10]2 years ago
7 0
Bromcresol green is the indicator that is blue in a solution that has a Ph of 5.6.
Vlad1618 [11]2 years ago
4 0

Answer:

1) bromcresol green

Explanation:

An acid base indicator is used to indicate the completion of an acid base titration experiment. Acid base indicators shows color change with a change in the pH of the solution. Bromcresol green, methyl orange, thymol blue, and bromthymol blue are acid base indicators. At pH of 5.6 bromcresol green is blue, methyl orange is yellow, thymol blue is yellow, and bromthymol blue is also yellow.

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A 0.0035 M aqueous solution of a particular compound has pH = 2.46. The compound is (A) a weak base (B) a weak acid (C) a strong
slava [35]

Answer:

(a) A strong acid

Explanation:

We have given the pH of the solution is 2.46

pH=2.46  

So the concentration of H^+=10^{-pH}=10^{-2.46}=0.00346

solution having H+ concentration more than H^+=10^{-7} is acidic

Since in the given solution, H+ concentration is 0.00346 M which is more than 10^{-7}[/tex] so this is an acidic solution

Note-The concentration of H^+ decide the behavior of the solution that is, it is acidic or basic

7 0
2 years ago
Which has not been suggested as a reasonably practical way to store large amounts of hydrogen in relatively small spaces for its
Yakvenalex [24]

Answer: A. Liquefy hydrogen under pressure and store it much as we do with liquefied natural gas today.

Explanation:

Current Hydrogen storage methods fall into one of two technologies;

  1. <em>physical storage</em> where compressed hydrogen gas is stored under pressure or as a liquid; and
  2. <em>chemical storage</em>, where the hydrogen is bonded with another material to form a hydride and released through a chemical reaction.

Physical storage solutions are commonly used technologies but are problematic when looking at using hydrogen to fuel vehicles. Compressed hydrogen gas needs to be stored under high pressure and  requires large and heavy tanks. Also, liquid hydrogen boils at -253°C (-423°F) so it needs to be stored cryogenically with heavy insulation and actually contains less hydrogen compared with the same volume of gasoline.  

Chemical storage methods allow hydrogen to be stored at much lower pressures and offer high storage performance due to the strong binding of hydrogen and the high storage densities. They also occupy relatively smaller spaces than either compressed hydrogen gas or liquified hydrogen. A large number of chemical storage systems are under investigation, which involve hydrolysis reactions, hydrogenation/dehydrogenation reactions, ammonia borane and other boron hydrides, ammonia, and alane etc.

Other practical storage methods being researched that focuses on storing hydrogen as a lightweight, compact energy carrier for mobile applications include;

  • Metal hydrides  e.g. LiH
  • Nanostructured metal hydrides
  • Non-metal hydrides
  • Carbohydrates
  • Synthesized hydrocarbons
  • Aluminum
  • Liquid organic hydrogen carriers (LOHC)
  • Encapsulation , e.t.c.
5 0
2 years ago
Identify the sets of quantum numbers that describe all the electrons in the ground state of a neutral beryllium atom, be. each s
Mkey [24]
<span>A beryllium atom has 4 electrons. 1, 0, 0, +1/2 1, 0, 0, -1/2 2, 0, 0, +1/2 2, 0, 0, -1/2</span>
8 0
2 years ago
The metallic radius of a potassium atom is 231 pm. What is the volume of a potassium atom in cubic meters?
Sauron [17]
1 pm = 10∧-10 cm
Therefore, 230 pm is equivalent to 2.3 ×10∧-8 cm.
Atom is in the shape of a sphere,
The volume of a sphere is given by 4/3πr³
Thus, volume of the atom = 4/3π( 2.3 ×10∧-8)³
                                          = 4/3 (3.142 ×12.167×10∧-24
                                           = 5.096 ×10∧-23 cm³
but 1m³= 1000000cm³
Therefore, the volume of the atom = 5.096 ×10∧-29 m³
8 0
2 years ago
Calculate the number of grams of solute in 500.0 mL of 0.189 M KOH.
KIM [24]

Answer : The number of grams of solute in 500.0 mL of 0.189 M KOH is, 5.292 grams

Solution : Given,

Volume of solution = 500 ml

Molarity of KOH solution = 0.189 M

Molar mass of KOH = 56 g/mole

Formula used :

Molarity=\frac{\text{Mass of KOH}\times 1000}{\text{Molar mass of KOH}\times \text{Volume of solution in ml}}

Now put all the given values in this formula, we get the mass of solute KOH.

0.189M=\frac{\text{Mass of KOH}\times 1000}{(56g/mole)\times (500ml)}

\text{Mass of KOH}=5.292g

Therefore, the number of grams of solute in 500.0 mL of 0.189 M KOH is, 5.292 grams

7 0
2 years ago
Read 2 more answers
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