How much of 30% hcl and 45% hcl would be needed to mix and produce 50 liters of 35% hcl?

42.8572 L of 30% HCl and 7.1428 L of 45% HCl would be needed to mix and produce 50 liters of 35% HCl.

Explanation:

Let volume of  30% HCl solution required to make 35% of HCl solution be x

Volume of 45% of HCl required to make 35% of HCl solution be y

Volume of solution required = 50 L

x + y = 50 ..(1)

30% of x +45 % of y = 35% of 50

3x + 45y = 1750 ..(2)

Solving equation (1) and (2):

x = 42.8572 L

y =7.1428 L

42.8572 L of 30% HCl and 7.1428 L of 45% HCl would be needed to mix and produce 50 liters of 35% HCl.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.