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
sleet_krkn [62]
2 years ago
7

In this experiment you used an excess of the BaCl2 solution. How would your results be affected if you did not use an excess of

the BaCl2 solution? Would this error cause your calculation of the mass percent of sulfate in the unknown to be too high or too low? Explain.
Chemistry
1 answer:
Igoryamba2 years ago
3 0

if we did not use an excess of the BaCl2 solution it would decrease the mass percentage of sulfate in the unknown sample.

The net precipitation equation would be.

Ba2+(aq) + SO42-(aq)  → BaSO4(s)

If BaCl2 (Ba2+) is not taken in excess then the precipitation would not be completed as some of the sulfate ions would still be remaining in the solution. This would decrease the mass percentage of sulfate in the unknown sample.

If some tiny pieces of filter paper still remained mixed with the precipitate(BaSO4) then the mass of sulfate would increase and it gives a high mass percentage of the sulfate.

mass percentage of sulfate = (mass of sulfate/mass of sample)*100

Learn more about precipitation here brainly.com/question/14675507

#SPJ4

You might be interested in
The exhaust gas from an automobile contains 1.5 percent by volume of carbon monoxide. What is the concentration of CO in mg/m' a
FrozenT [24]

Answer:

(a) 17,178 mg/m3

(b) 11,625 mg/m3

Explanation:

The concentration of CO in mg/m3 can be calculated as

C (mg/m3) =(P/RT)*MW*C_{ppm}

For standard conditions (1 atm and 25°C), P/RT is 0.0409.

Concentration of 1.5% percent by volume of CO is equivalent to 1.5*10,000 ppm= 15,000 ppm CO.

The molecular weigth of CO is 28 g/mol.

(1) For 25°C and 1 atm conditions

C=(P/RT)*MW*C_{ppm}\\\\C=0.0409*28*15,000=17,178

(b) For 200°C and 1.1 atm,

P/RT=0.0409*(P/P_{std})*(T_{std}/T)\\P/RT=0.0409*(1.1atm/1atm)*(273+15K/273+200K)=0.0277

Then the concentration in mg/m3 is

C=(P/RT)*MW*C_{ppm}\\\\C=0.0277*28*15,000=11,625

5 0
3 years ago
How many grams<br>are in 3.0 moles of KCI<br>(potassium chloride)?​
Ganezh [65]

Answer: I thinc 223.6539

Explanation:

7 0
3 years ago
Greenland ice sheets
olga nikolaevna [1]
<span>The Greenland ice sheet is a vast body of ice covering 1,710,000 square kilometers, roughly 80% of the surface of Greenland. It is the second largest ice body in the world, after the Antarctic ice sheet.</span><span />
8 0
3 years ago
An atomic number stands for the number of _____. neutrons in the nucleus of an atom protons in the nucleus of an atom valence el
Effectus [21]

Answer:

atoms or electrons

Explanation:

but l guess electrons is the best answer

5 0
3 years ago
A gas has an initial volume of 15 L. If the temperature increases from 330 K to 450 K, what is the new volume.
Artist 52 [7]

Answer:

20.(45)L or about 20.4545L

Explanation:

PV = nRT

Where:

P - pressure

V - volume

n - number of particle moles

R - a constant

T - temperature in K

We can assume the P and n (and definitely R) stay the same, so we infer that

V_1 = \frac{nRT_1}{P} = 15L\\V_2 = \frac{nRT_2}{P}\\V_1 / V_2 = \frac{nRT_1}{P} / \frac{nRT_2}{P} = \frac{T_1}{T_2}\\\\15L / V_2 = \frac{330K}{450K} = \frac{11}{15}\\\\V_2 = 15L \cdot \frac{15}{11} = 20.(45)L

4 0
3 years ago
Other questions:
  • Tetraphosphorous decoxice (P4O10) reacts with water to produce phosphoric acid.
    15·1 answer
  • A coffee cup calorimeter was used to measure the heat of solution, the change in enthalpy that occurs when a solid dissolves in
    7·1 answer
  • Gaseous methane CH4 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. If 12.4g of c
    7·1 answer
  • Is baking bread a chemical or physical change? a Chemical b Physical c Neither
    8·1 answer
  • How do densities of the solids compare to those of the liquid?
    12·1 answer
  • Which of the following can be represented by a single chemical symbol?
    11·1 answer
  • Which of the following best describes a hypothesis?
    10·2 answers
  • How many molecules are in 4.5 moles of Ca(OH),?​
    14·2 answers
  • HELP ASAPP
    5·1 answer
  • Which element does not like to bond with other atoms?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!