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3 years ago

If a solution turns litmus paper turns red, which type of solution is it?

2 answers:

8 0

An acid
A neutral solution will not change the litmus paper colour or it will change to green
And a base would change it blue.

lukranit [14]3 years ago

6 0

Answer:

An acid solution.

Explanation:

The litmus paper is an acid-base indicator, its colors change depending on the pH of the solution. If the pH < 4.5, the litmus paper turns red, if the pH> 8.3 the litmus paper turns blue.

If the pH > 7, there is a base solution, if the pH< 7 there is an acid solution, and if the pH = 7 its a neutral solution.

So, if the litmus paper turned red, the solution has pH<4.5, and it's an acid solution.

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For each of the following pairs of compounds, name one absorption band that could be used to distinguish between them. CH3CH2OH

GrogVix [38]

Answer:

For CH3CH2OH the OH stretch between 3550-3200 cm-1

For CH3CH2NH2 a pair of bands at 3500 and 3400 cm-1 respectively corresponding to the N-H stretch

Explanation:

CH3CH2OH is ethanol. This is a primary alcohol characterized by the by the -OH (hydroxyl) group. A strong broad IR absorption in the 3550 - 3200 cm-1 corresponds to the O-H stretch and indicates that the compound could be an alcohol or it has an OH functional group.

CH3CH2NH2 is ethylamine. This is a primary amine characterized by the -NH2 (amino) group. The presence of a primary amine shows up as a pair of medium strength absorption features corresponding to the N-H stretch, one at around 3500 cm-1 and the other around 3400 cm-1.

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3 years ago

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kirza4 [7]

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4 years ago

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3 years ago

Read 2 more answers

A quantity of liquid methanol, CH3OH, is introduced intoa rigid 3.00-L vessel, the vessel is sealed, and the temperature israise

Tom [10]

Answer:

74,3 grams is the mass of methanol that was initially introduced into the vessel

Explanation:

CH3OH(g) ----> 1 CO(g) + 2 H2(g)

initial: Idk what i have (X) - -

react: initial - react react react

equilibrium: A concentration A conc. 0.426 M

in equilibrum in eq

See that in equilibrium are formed 2 moles of H2 with this concentration, 0,426M and you form 1 mol of CO, so the moles that are formed of H2 are the double of CO, because stoychiometry.

CH3OH(g) ----> 1 CO(g) + 2 H2(g)

initial: Idk what i have (X) - -

react: initial - react react react

equilibrium: A conc. in eq 0,213 M 0.426 M

So we have concentrations of products in equilibrium, and we have Kc, now we can find concentration of reactants in equilibrium

Kc = ([CO] . [H2]*2) / [CH3OH]

6,9X10*-2 = (0,213 . 0,426*2) / [CH3OH]

[CH3OH] = (0,213 . 0,426*2) / 6,9X10*-2

[CH3OH] = 0,560 M

You know that 1 mol which reacted has this concentration in equilibrium, 0,213 M so I can know what's my initial concentration of reactive

Initial - react = equilibrium

initial - 0,213M = 0,560M ---> Initial = 0,773 M

0,773M is initial concentration of CH3OH, but this is molarity, (moles in 1L). My volume is 3 L so

1 L _____ 0,773 moles

3 L _____ 3L . 0,773moles = 2,319 (the moles that i used)

Molar mass CH3OH = 32.06 g/m

Moles . molar mass = grams ---> 2,319 moles . 32,06 g/m = 74,3 g

8 0

3 years ago

Define matter. Give 5 examples of matter.  

Vera_Pavlovna [14]

Matter is the psychical property of an object.

Examples: Apple, Orange, baseball, Banana and a table

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4 years ago