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2 years ago

Which two reactants make Calcium carbonate?

Chemistry

2 answers:

Norma-Jean [14]2 years ago

3 0

Impossible to form from given reactants

Explanation:

Only sodium has carbonate ion here .so only possible way to displace carbonate is to use potassium

When sodium carbonate and Potassium iodide react with each other double displacement reaction occurs

As potassium is powerful than sodium it displaces sodium to form potassium carbonate .

Then you have to use water and then you can use calcium suppliment .

Debora [2.8K]2 years ago

3 0

Answer:

Calcium chloride
Sodium carbonate

Explanation:

The reaction :

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This is clearly an example of a displacement reaction, where sodium displaces calcium in calcium chloride to form sodium chloride, and we are left with calcium carbonate.

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If the a of a monoprotic weak acid is 1. 2×10^−6. What is the [H] of a 0. 31 m solution of this acid?

Vanyuwa [196]

The pH of the solution of the given acid is 3.099

Let HX be the weak acid:

HX ⇌ $H^{+}$ + $X^{-}$

For which:

$K_{a}$ = [ $H^{+}$ ][ $X^{-}$ ] / [HX]

If $K_{a}$ lies in the range $10^{-4} - 10^{-10}$ we can assume that the equilibrium concentrations used in the expression are a good enough approximation to the initial concentrations.

Rearranging and taking negative logs of both sides gives:

pH = $\frac{1}{2} [pK_{a} - loga]$

a is the concentration of the acid.

$pK_{a} =-logK_{a}$ = -log (2× $10^{-6}$ ) = 5.69

pH = $\frac{1}{2} [5.69- (-0.508)]$

pH = 3.099

Learn more about pH of acid here;

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2 years ago

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Ivenika [448]

Answer:

Explanation:

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4 years ago

Significant factors of (9.9 x 10^4) + (4.88 x 10^2) + (7.60 x 10^3) = ______

Arisa [49]

Answer:

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3 years ago

We need a 3.0M aqueous HCl solution to dissolve the middle of a penny which is made of nickel. What mass of HCl is contained in

natta225 [31]

Answer:

262.8 g

Explanation:

Molarity = 3.0M

Mass = ?

Volume = 2.40L

The relationship between these quantities is given as;

Molarity = Number of moles / Volume

Number of moles = Molarity * Volume

Number of moles = 3 * 2.4 = 7.2 mol

Mass = Number of moles * Molar mass

Molar mass of HCl = 1 + 35.5 = 36.5 g/mol

Mass = 7.2 * 36.5 = 262.8 g

5 0

3 years ago

Read 2 more answers

Match the assumption with the correct unit of concentration.

KATRIN_1 [288]

Answer:

1. D/E

2. D/J

3. B/F

4. D or G/I

5. A

Explanation:

This is about sort of concentrations:

1- Molarity

Moles of solute in 1 L of solution

(we can also say, mmoles of solute in 1 mL)

2- Molality

Moles of solute in 1kg of solvent

3. mass %

grams of solute in 100g of solution

4. mole fraction

moles of solute or solvent per moles of solution

5. ppm

mg of solute in 1kg of solution

(we can also say μg of solute in 1 g of solution, or mg solute in 1L of solution)

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3 years ago