The titration reaction can be represented as mgcl2(aq) 2 naoh(aq) → mg(oh)2(s) 2 nacl(aq) the solubility equilibrium is written as mg(oh)2(s) ⇌ mg2 (aq) 2 oh-(aq) kemmi is trying to teach noke how to calculate the concentration of the mg2 cation at the titration endpoint. she explains that the initial mgcl2 concentration must be multiplied by the volume of mgcl2 pipetted and divided by the total volume at the endpoint. (note: the calculation page in the lab manual has a similar equation for the lead cation.) noke do her calculation. for the first titration in the set the initial concentration of mgcl2(aq) was 0.0050 m, the volume measured was 100.00 ml, and the total volume of solution at the endpoint was 104.12 ml. calculate the concentration of mg2 at the endpoint. (answer with 2 significant digits and units of m)

The concentration of Mg²⁺ cation at end point: M₂ = 0.0048 M

Explanation:

The titration reaction involved: MgCl₂(aq) + 2 NaOH(aq) → Mg(OH)₂(s) + 2 NaCl(aq)

and the solubility equilibrium for the product: Mg(OH)₂(s) ⇌ Mg²⁺ (aq) + 2 OH⁻(aq)

Given: Concentration of MgCl₂: M₁ = 0.005 M, volume of MgCl₂: V₁ = 100 mL, Total volume of solution at end point = 104.12 mL

Concentration of Mg²⁺ cation at end point: M₂ = ?M

Now, to calculate the concentration of Mg²⁺ cation at end point, we use the equation:    M₁ × V₁ = M₂ × V₂

⇒ M₂ = M₁ × V₁ ÷ V₂

⇒ M₂ = (0.005 M × 100 mL) ÷ 104.12 mL

⇒ M₂ = 0.0048 M (2 significant digits)

Therefore, the concentration of Mg²⁺ cation at end point: M₂ = 0.0048 M

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation:

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.