This
is a neutralization, which means we are mixing a base with an acid until the
mixture becomes neutral. We add more HI to the NaOH until the number of acid
equivalents is equal to the number of base equivalents. We can calculate the
acid equivalents using normality and volume, and the same with base equivalents.
A =
acid equivalents = normality*volume (in the acid solution)
B =
base equivalents = normality*volumen (in the base solution)
A =
B
NA*VA
= NB*VB
HI
is an acid which releases only 1 acid equivalent per molecule, so its molarity
is equal to its normality.
NaOH
is a base which releases only 1 base equivalent per formula unit, so its
molarity is equal to its normality.
MA*VA
= MB*VB
We’re
trying to find out NaOH molarity, which is equal to the NaOH normality.
MB
= MA*VA/VB
DATA:
MA
= 3.0 M
<span>The
volumen of HI used can be calculated by subtracting the
final volume of the burette to its initial volume (the final volume is smaller,
as we have taken some volume away)</span>
VA
= V0-Vf = 0.7 ml - 0.2 ml = 0.5 ml
VB
= V0-Vf = 47.6 ml - 37.5 ml = 10.1 ml
MB
= 3.0M*0.5M/10.1M = 0.149 M
Answer:
2.48 × 10⁴ mol
Explanation:
Step 1: Write the balanced equation
2 CrO₄²⁻ + 3 SO₂ + 4 H⁺ ⇒ Cr₂(SO₄)₃ + 2 H₂O
Step 2: Calculate the reacting moles of CrO₄²⁻
3.00 × 10⁸ L of 5.50 × 10⁻² mM CrO₄²⁻ react. The reacting moles are:
3.00 × 10⁸ L × 5.50 × 10⁻² × 10⁻³ mol/L = 1.65 × 10⁴ mol
Step 3: Calculate the reacting moles of SO₂
The molar ratio of CrO₄²⁻ to SO₂ is 2:3. The reacting moles of SO₂ are 3/2 × 1.65 × 10⁴ mol = 2.48 × 10⁴ mol.
Fingerprint is the print of our finger, remote sensing are placed usually in locks in safety areas, it identifies the matching fingerprint and allows the people to enter, and in DNA barcode, location can be detected by remote sensing.
<h3>What is remote sensing?</h3>
Remote sensing is the identification of the sense of people, the data is feed to the device then according to the data it senses the presence and allow that people.
DNA barcoding is taking small fragment of DNA to find the progeny or its availability.
Thus, Remote sensing is typically used in locks in security areas to identify matching fingerprints and allow people to enter, and in DNA barcodes, location can be detected using remote sensing.
Learn more about remote sensing
brainly.com/question/10839378
#SPJ1
60 minutes
thanks again I appreciate you I'm sorry but you ok if I invite to you in my prayers for you and Mani
