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slava [35]
3 years ago
7

What must a food handler use to determine the concentration of sanitizing solution?

Chemistry
2 answers:
Marina86 [1]3 years ago
8 0

Answer:

He must test the solution with a sanitizer kit.

Explanation:

The concentration of sanitizing solution must be tested with a sanitizing kit. It is composed of disinfectant test strips that measure the sanitizing solution concentration. A very important part of the daily operation of a food establishment is the proper disinfection of the equipment.  Generally, chlorine is used to disinfect multipurpose utensils, food contact surfaces and other food preparation items. Over time, the concentration of chlorine decreases due to volatile elements.

Have a nice day!

sattari [20]3 years ago
3 0
I believe a food handler must use a test kit to determine the concentration of sanitizing solution. Sanitizing reduces pathogens on a surface to safe levels. The sanitizer are the agents that are used for sanitizing ; their effectiveness is determined by the factors such as concentration, contact time, pH, temperature, and also water hardness.
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A solution of phosphoric acid was made by dissolving 10.0 g of H3PO4 in 100.0 mL of water. The resulting volume was 113 mL. Calc
rodikova [14]

Explanation:

Mass of solute = 10.0 g

mass of solvent(water) = m

Volume of solvent( water) = v = 100.0 mL

Density of water= d = 1 g/cm^3=1 g/mL

1 mL= 1 cm^3

m=d\times v=1.0 g/mL\times 100.0 = 100.0 g

Mass of solution(M) = Mass of solute + mass of solvent

M = 10.0 g + 100.0 g = 110.0 g

Volume of the solution = V = 113 mL

Density of the solution = D

D=\frac{M}{V}=\frac{110.0 g}{113 mL}=0.9734 g/mL

The density of the solution is 0.9734 g/ml.

Moles of phosphoric acid = n_1=\frac{10.0 g}{98 g/mol}=0.1020 mol

Moles of water  = n_2=\frac{100.0 g}{18g/mol}=5.556 mol

Mole fraction of phosphoric acid =\chi_1

\chi_1=\frac{n_1}{n_1+n_2}=\frac{0.1020 mol}{0.1020 mol+5.556 mol}

\chi_1=0.01803

Mole fraction of water =\chi_2

\chi_2=\frac{n_2}{n_1+n_2}=\frac{5.556 mol}{0.1020 mol+5.556 mol}

\chi_2=0.9820

[Molarity]=\frac{\text{Moles of solute}}{\text{Volume of solution(L)}}

Moles of  phosphoric acid = 0.1020 mol

Volume of the solution = V = 113 mL = 0.113 L ( 1 mL = 0.001 L)

Molarity of the solution :

=\frac{0.1020 mol}{0.113 L}=0.903 M

[Molality]=\frac{\text{Moles of solute}}{\text{Mass of solvent(kg)}}

Moles of  phosphoric acid = 0.1020 mol

Mass of solvent(water) = m =100.0 g = 0.100 kg ( 1 g = 0.001 kg)

Molality of the solution :

=\frac{0.1020 mol}{0.100 kg}=1.02 mol/kg

6 0
3 years ago
Mg(NO3)2 soluble or insoluble?
hammer [34]

Answer:

The chemical compound Mg(NO3)2, also known as magnesium nitrate, is very soluble, especially in water.

7 0
3 years ago
Why is unit of pressure called a derived unit ?? 2) how do you measure the volume of milk?<br>​
trasher [3.6K]

1. Unit of pressure called a derived unit because it is a combination of base units (kg·m^-1·s^·2).

2. We measure the volume of milk by a instrument called Milk Lactometer.

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=I_%7B2%7D" id="TexFormula1" title="I_{2}" alt="I_{2}" align="absmiddle" class="latex-formula">
gogolik [260]

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Explanation:

An Oxidant is any substance that oxidizes, or receives electrons from, another; in so doing, it becomes reduced in oxidation number.

A Reductant thus exactly the opposite.

Note that the equation provided shows that Iodine (I2) received an electron to become NEGATIVELY CHARGED:

I2 --> 2I-.

The oxidation number reduced from 0 to -1.

In contrast, the oxidation number of 2S2O3(-2) increases from -4 to -2.

Thus, I2 is the Oxidant; while the 2S2O3(-2) is the reductant.

7 0
3 years ago
What are atoms made of
Olegator [25]
Protons, neutrons, and electrons.
7 0
3 years ago
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