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3 years ago

During a titration, a known concentration of _ is added to a _ of an unknown concentration g

Chemistry

1 answer:

Vanyuwa [196]3 years ago

8 0

Explanation:

The whole process of titration involves finding the concentration of a solution (usually an acid or base) by adding (titrating) it to a solution(acid or base) with a known concentration.

The solution of unknown concentration (the analyte) is usually placed in an flask, while the solution of known concentration (titrant) is placed in a burette and slowly added to the flask.

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option B

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2 years ago

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An iron pipe has a density of 7.86 g/mL and a volume of 324.4 mL. What is the mass of the iron pipe?

wlad13 [49]

Answer:

$Mass=2549.784 \ g$

Explanation:

The equation for mass is:

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What is the charge of an atom's nucleus of an atom has 20 protons, 23 neutrons, and 18 electrons?

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It would have a charge of +2.

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3 years ago

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IF YOU KNOW THE REST OF THE TEST'S ANSWERS PLEASE SHARE

Semenov [28]

Answer:

B. a state in which the forward and reverse reactions are proceeding at equal rates

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When magnesium reacts with hydrochloric acid, hydrogen gas is formed: 2HCl + Mg → H2 + MgCl2. What is the volume of hydrogen pro

Maksim231197 [3]

Answer:- C. 16.4 L

Solution:- The given balanced equation is:

$2HCl+Mg\rightarrow H_2+MgCl_2$

From this equation, there is 2:1 mol ratio between HCl and hydrogen gas. First of all we calculate the moles of hydrogen gas from given grams of HCl using stoichiometry and then the volume of hydrogen gas could be calculated using ideal gas law equation, PV = nRT.

Molar mass of HCl = 1.008 + 35.45 = 36.458 gram per mol

The calculations are shown below:

$49.0gHCl(\frac{1molHCl}{36.458gHCl})(\frac{1molH_2}{2molHCl})$

= $0.672molH_2$

Now we will use ideal gas equation to calculate the volume.

n = 0.672 mol

T = 25 + 273 = 298 K

P = 101.3 kPa = 1 atm

R = $0.0821\frac{atm.L}{mol.K}$

PV = nRT

1(V) = (0.672)(0.0821)(298)

V = 16.4 L

From calculations, 16.4 L of hydrogen gas are formed and so the correct choice is C.

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3 years ago

During a titration, a known concentration of _____ is added to a _____ of an unknown concentration g

During a titration, a known concentration of _ is added to a _ of an unknown concentration g