The sample size is 233.19 mg and the purity of the sample is 48.97%
Why?
The chemical reaction between Na₂CO₃ and HCl is
Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂
The sample size that will react with 40 mL of 0.1100 M HCl is found by applying the following conversion factor to go from L of solution of HCl to mg of Na₂CO₃:
Now, in order to find the percentage purity we have to apply another conversion factor to go from mL of solution of HCl to g of Na2CO3, and dividing everything over the mass of the soda ash sample, followed by multiplying the result times 100 to find the percentage:
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Answer:
0.689 mg/L Cu
Explanation:
The equation of the best-fit line is:
<em>y</em> = 0.6136<em>x</em> + 0.0142
Where <em>y</em> is the absorbance and <em>x</em> is the concentration in mg/L.
Now using that equation we <u>calculate </u><u><em>x</em></u> when <em>y</em> is equal to 0.438, 0.434 & 0.439.
1) 0.438 = 0.6136<em>x</em> + 0.0142
x = 0.691 mg/L
2) 0.434 = 0.6136<em>x</em> + 0.0142
x = 0.684 mg/L
3) 0.439 = 0.6136<em>x</em> + 0.0142
x = 0.692 mg/L
Finally we <u>calculate the mean of the three concentrations</u>:
- (0.691 + 0.684 + 0.692)/3 = 0.689 mg/L
Answer:
Explanation:
From the question we are told that:
Volume of hydrogen
Temperature
Pressure of water
Let
STP(Standard Temperature and pressure)
Generally the equation for ideal gas is mathematically given by
Therefore
(at STP(Standard Temperature and pressure))
Answer:NaOH
Explanation:all are acids except NaOH
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