Titration is done using a titrant and analyte. In a titration the name of the substance that is being determined is called the analyte.
What is titration?Titration is an analytical method of finding concentration of a solution using a known concentration of a standard reagent. The standard reagent is called titrant and the solution with unknown concentration is called analyte.
There are different types of titrations such as acid-base titration, complexometric titration, potentiometric titrations etc. All these need an indicator and used to determine the end point by a color change.
In acid-base titration, acid is taken in the burette and base in the pipette and using an indicator the end point is noted.
In complexometric titration, metal solutions are analyzed with an indicator capable of forming complex with the metal. In this way in all types of titrations the normality or molarity of the solution.
Hence, the substance being determined using titration is called analyte.
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What precautions must be taken when handling 0.5 m hcl and 0.3m koh solutions in the laboratory?
The precautions we take to handle these solutions is to wear safety goggles, lab coat and also the hand gear (this is also important).
KOH (potassium hydroxide), which is a strong base and HCL (hydrochloric acid) which is a strong base and both these solutions dissociates completely in water. So, whenever you are working in laboratory with chemicals you must be careful.
The titration of 25.00 ml a 0.125 m hclo4 solution requires 27.07 ml of koh to reach the endpoint. what is the concentration of the koh
Answer : The concentration of the [tex]KOH[/tex] is, 0.115 M
Explanation :
Using dilution law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1[/tex] = basicity of an acid = 1
[tex]n_2[/tex] = acidity of a base = 1
[tex]M_1[/tex] = concentration of [tex]HClO_4[/tex] = 0.125 M
[tex]M_2[/tex] = concentration of KOH = ?
[tex]V_1[/tex] = volume of [tex]HClO_4[/tex] = 25 ml
[tex]V_2[/tex] = volume of NaOH = 27.07 ml
Now put all the given values in the above law, we get the concentration of the [tex]KOH[/tex].
[tex]1\times 0.125M\times 25ml=1\times M_2\times 27.07ml[/tex]
[tex]M_2=0.115M[/tex]
Therefore, the concentration of the [tex]KOH[/tex] is, 0.115 M
The concentration of 27.07ml of KOH solution requires to titrate 25mL of 0.125 M HClO₄ is 0.115 M.
How do we calculate the concentration?Concentration of any solution in the titration will be calculated by using the below equation as:
M₁V₁ = M₂V₂, where
M₁ & V₁ is the molarity and volume of HClO₄ and M₂ & V₂ is the molarity and volume of KOH solution. Now putting values from the question on the above equation, we get
M₂ = (0.125)(25) / (27.07) = 0.115 M
Hence required concentration of KOH is 0.115M.
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Gold has a molar mass of 197 g/mol. (a) how many moles of gold are in a 3.98 g sample of pure gold? (b) how many atoms are in the sample?
Do you know how to do this? if you have 4 grams of carbon-14, how much carbon 14 remains after 11,460 years? the half life is 5,730 years.
WILL MARK AS BRAINLIEST
Name the following ionic compounds.
Compare and contrast an ionic bond with a polar covalent bond
If cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? hints if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion.
What did Dmitri Mendeleev contribute to science
He arranged the first periodic table?
Sodium, a group 1 element with an electron configuration of 1s22s23s1, will form a _____ ion in a chemical bond ?
Pellets of calcium chloride are spread on a sidewalk covered in water that is 36°C. Under which circumstance will the calcium chloride dissolve faster?
Answer:
In case if the pellets of the calcium chloride gets crushed.
Explanation:
When the pellets of calcium chloride get crushed it enhances the surface area of the compound. With the increase in surface area, the number of collisions in between the molecules of reactants increases. In the given case, the reactant molecules are water molecules and calcium chloride ions. In the procedure of dissolution, the calcium chloride ions get hydrated by the water molecules dipoles. As the frequency of the collision enhances, the activation energy gets lowered in order to begin the reaction.
why does your reflection in a mirror look different from your reflection in wood
The surface of a mirror is smoothly and therefore the rays of light are reflected with the same angle they hit the surface. The surface of a piece of wood on the other hand has a lot of microscopical imperfections and hence the rays of light are reflected in multiple directions.
The reflection in a mirror looks different from the reflection in wood because mirrors have smooth surfaces that reflect light at specific angles, while wood and other rough surfaces diffuse and reflect light in many different directions.
Explanation:When we look at our reflection in a mirror, we see a clear and accurate representation of ourselves because mirrors have smooth surfaces that reflect light at specific angles. On the other hand, when we look at our reflection in wood or other rough surfaces, the light gets diffused and reflected in many different directions, causing distortions and a less accurate reflection.
The wavelength of the characteristic, bright yellow-orange flame test color of sodium is 590 nm. Calculate the average energy (ΔE) associated with this atomic emission line.
Final answer:
The average energy associated with the atomic emission line of sodium with a wavelength of 590 nm is calculated using Planck's equation, resulting in an energy of approximately 3.37×10-19 Joules per photon.
Explanation:
The question asks for the calculation of the average energy (ΔE) associated with the atomic emission line of sodium, which has a wavelength of 590 nm. To calculate this, we use the Planck's equation ΔE = h⋅c / λ, where h is Planck's constant (6.626×10-34 J⋅s), c is the speed of light in a vacuum (3.00×108 m/s), and λ is the wavelength in meters.
To convert the wavelength from nanometers to meters, we use the conversion 590 nm = 590 × 10-9 m. Substituting the values into the equation gives us ΔE = (6.626×10-34 J⋅s) ⋅ (3.00×108 m/s) / (590×10-9 m), which calculates to an energy of about 3.37×10-19 Joules per photon.
The United States is one of the few countries in the world which has not yet adopted the metric system for general use. True or False
What is a double bond?
Question 4 options:
two covalent bonds between adjacent molecules
a total of two covalent bonds in a molecule
two covalent bonds between adjacent atoms in a molecule
a total of two covalent bonds between molecules
The answer is A
Two covalent bonds between adjacent molecules
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In the water cycle, which state of matter has the particles closest together? solid liquid gas plasma
Answer:
solid
Explanation:
the weight of an object is constant. true false
Why is gunshot residue important for a forensic scientist? What are the potential complications with this type of evidence?
Answer 1: A gun shot residue is the powdery discharge that release after the firing process of the firearm. The powdery discharge consists of unburnt or partially burnt primer, propellants, fragments of the projectiles, cartilage cases and residues present inside the firearm.
It is important for the forensic scientists so as to detect the culprit as these residues are left on the clothes and hands after firing. It can be used to identify the direction and distance of firing.
Answer 2: The complications associated with gunshot residue are:
1. The particles are very small and may exhibit low density they are likely to blow by wind so they may not be found at some crime scene.
2. As the powdery discharge consists of explosive particles in small amounts but on testing can explode and can cause harm.
Use the periodic table to answer this question: are the properties of rubidium (rb) more similar to cesium (cs) or those of strontium (sr)
Which sample of copper has atoms with the lowest average kinetic energy?
How many orbitals are possible in the third energy level?
In the reaction B + KL + H, if an additional B is added, the result will be _____.
more K will be produced
more L will be required
the reaction will slow down
more L and H will be produced
Answer is: more L and H will be produced.
Balanced chemical reaction: B + K → L + H.
According to Le Chatelier's Principle, the position of equilibrium moves to counteract the change.
The position of equilibrium will move so that the concentration of B decreases again, by reacting more and produce L and H, reaction is going to be more in forward direction.
Why is a neutral iron atom a different element than a neutral carbon atom?
How many grams of h2 are needed to react with 48 grams of o2, given the reaction: 2 h2 (g) + o2 (g) --> 2 h2o (l)?
The stoichiometric equation shows that 2 moles of H2 react with 1 mole of O2. In this scenario, 48 grams of O2 is equivalent to 1.5 moles. Therefore, 1.5 moles of O2 would react with 3 moles of H2, which is equivalent to 6 grams.
Explanation:To solve this question, we must first understand the stoichiometric relationship that exists between H2 and O2 according to the given equation: 2 H2 (g) + O2 (g) --> 2 H2O (l). What this equation shows is that 2 moles of H2 react with 1 mole of O2.
Next, we must convert grams of O2 to moles, using its molar mass. The molar mass of O2 is 32 g/mol, so 48 grams of O2 is equivalent to 48 g / 32 g/mol = 1.5 mol.
Then we use the stoichiometric relationship to calculate the moles of H2 needed. As per the reaction, 1 mole of O2 reacts with 2 moles of H2, hence 1.5 moles of O2 would react with 2*1.5 = 3 moles of H2. Finally, convert the moles of H2 to grams, using its molar mass (2 g/mol). So, 3 mol * 2 g/mol = 6 g. Therefore, 6 grams of H2 are needed to react with 48 grams of O2.
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What are the most reactive metals found on the periodic table?
When does water act as an acid and a base?
Water can donate a proton to become a hydronium ion or hydroxide ion.
Water can accept a proton to become a hydronium ion, or donate a proton to become a hydroxide ion.
Water can accept a proton to become a hydronium ion or a hydroxide ion.
Water can donate a proton to become a hydronium ion, or accept a proton to become a hydroxide ion.
Light travels in _______.
A.
circles
B.
waves
C.
electricity
D.
opaque objects
Nic bought 12 pens for 2$ each and 12pads of paper for 3$ each. Write two expressions for how nic could calculate his total.Write one expression in expanded form and one in factored form.
Calcium chloride contains calcium and chloride ions. write the ground-state electron configuration for the chlorine ion.
The electron configuration of an atom of Chlorine Cl (neutral Chlorine) is:
1s2 2s2 2p6 3s2 3p5
Now if the Chlorine becomes an ion, it becomes Cl-. So we can see that 1 electron is added therefore the new electron configuration is:
1s2 2s2 2p6 3s2 3p6
A student has two substances at a lab table. One substance is iron pyrite (fool's gold) and the other is real gold. After placing a 20.0-gram sample of iron pyrite into 40.0 mL of water in a graduated cylinder, it displaces 4.0 mL of water. The density of real gold is almost 4 times larger than iron pyrite. If a 20.0-gram sample of real gold is placed into the same amount of water, approximately how much water will be displaced?
A) 1 mL
B) 4 mL
C) 16 mL
D) 20 mL
Answer:The correct answer is option A.
Explanation
Mass of the iron pyrite= 20 grams
Volume water displaced by the iron pyrite = 4 mL
Density of iron pyrite=[tex]d_i=\frac{Mass}{Volume}=\frac{20 g}{4 mL}=5 g/mL[/tex]
[tex]d_g=4\times d_i[/tex](Given)
[tex]d_g=4\times 5 g/mL=20 g/mL[/tex]
Mass of gold = 20 g
Volume of water displaced by the 20 grams of water = V
[tex]D_g=20 g/mL=\frac{20 g}{V}[/tex]
V = 1 mL
20 grams of gold will displace 1 ml of water.So, the correct answer is option A.
Define and then describe the difference between a polar covalent bond, nonpolar covalent bond and ionic bond.